As stated in the sentence, the word "The Intelligent Investor" is the title of a book. Book titles should always be underlined or italicized. The correct choice is, "many regard the book The Intelligent Investor as the best book on investing."

All of the above choices are grammatically correct, but all but the correct option are obviously wordy. "He thought that everyone should be involved in politics" is the correct choice because it concisely states the same idea of all the other choices. None of the other choices add any substance to this sentiment (correct answer is always the most concise).

This sentence contains three errors:

1. Dangling preposition (for).
2. Sentence Fragment (second clause is incomplete).
3. Passive voice (he was respected).

The sentence needs to be reworded in order to fix these errors. Note that the correct sentence should always be in the active voice (i.e. the subject of a clause should do the action of the main verb). Additionally, prepositions should never end a clause. The correct choice is, "mistakes, people respected him for admitting them."

After the comma, we need the name or pronoun of the person. The use of which is incorrect. The remaining answers are incorrect because they are missing the pronoun after the comma. 

The word "which"does not have an antecedent noun, and therefore the construction is incorrect. Similarly, "this,"in the first answer, does not have a noun to which it refers. 

The verb "to be" means that we would use the subject forms of pronouns, except after the infinitive where we would use the object form. This sentence, however, contains an unnecessary and extraneous "with."

"It's" is correct because it is the contraction "it is." "Its" is incorrect because it is a possessive impersonal pronoun which would need a pronoun-verb construction in order to be correct. "Its'" is improper construction. 

Choices "In an extensive survey of Fortune 500 companies, recruiters indicated that the quality they prioritize most in an applicant is someone who takes initiative and seeks" and "Recruiters indicated in an extensive survey of Fortune 500 companies that the quality they prioritize most in an applicant is someone who take initiative, seeking" in this problem showcase a classic case of illogical predication:

"The quality they most prize is...someone who"

Is the person really the quality? The quality could be initiative, or they could be looking for someone who has that quality, but "the quality is someone" is illogical, saying that the quality is a person. Therefore "In an extensive survey of Fortune 500 companies, recruiters indicated that the quality they prioritize most in an applicant is someone who takes initiative and seeks" and "Recruiters indicated in an extensive survey of Fortune 500 companies that the quality they prioritize most in an applicant is someone who take initiative, seeking" are incorrect.

"Recruiters indicated in an extensive survey of Fortune 500 companies that they prioritize most heavily the quality in applicants who take initiative, seeking" has a similarly incorrect meaning in that it speaks of one quality that it never defines: "they prioritize most heavily the quality in applicants who take initiative..." What is the quality?

"In an extensive survey of Fortune 500 companies, recruiters indicated that they most heavily prioritize applicants who take initiative and seek" corrects these issues and is therefore correct - note that by omitting the words "the quality" altogether, "In an extensive survey of Fortune 500 companies, recruiters indicated that they most heavily prioritize applicants who take initiative and seek" is able to describe the quality ("applicants who take initiative") while avoiding the awkward meanings that that the other options discussed have from trying to wedge in that phrase.

"In an extensive survey of Fortune 500 companies, recruiters indicating that they most heavily prioritize applicants who have the quality of taking initiative and who seek" simply isn't a complete sentence, as it does not have a verb for the subject "employers." "indicating" may look like a verb but appears as a participial modifier (think of "John running" vs. "John is running").

In your initial scan of the answer choices, the only difference you will probably notice quickly is that between “is” and “develops” in "A crippling disorder for many young women, anorexia nervosa is", "A crippling disorder that affects many young women, anorexia nervosa is", and "A crippling disorder for many young women, anorexia nervosa develops". Why would you be given such a difference? Look at what follows the verb and you see that "A crippling disorder for many young women, anorexia nervosa is" and "A crippling disorder that affects many young women, anorexia nervosa is" suffer from illogical predication – the subject “anorexia nervosa” is illogically linked by the verb “is” to a clause starting with “when”. An illness or disorder is not a timeframe! The verb “develops” works because the clause then explains when/how the illness develops so "A crippling disorder for many young women, anorexia nervosa develops" is correct. In "Anorexia nervosa is a crippling disorder for many young women,", you again have the problem of what the “when” clause is linked to – there is no action verb like “develops” that can be modified by the clause. For "Anorexia nervosa is a crippling disorder for many young women;" you have an improper use of a semicolon as the clause that follows is not an independent sentence. 

This sentence contains a tricky sentence construction issue that you will likely miss unless you “Slash and Burn” the unnecessary parts of the sentence. The sentence is trying to show that there are two things relating to the 1000 patients: patients “whose cardiac disease was not well controlled….and who had not suffered persistent symptoms”. In "and had suffered persistent symptoms that had been lasting for at least a year", "and suffered from persistent symptoms that had lasted for at least a year", "but were suffering from persistent symptoms that had been lasting for a year or more" and "but had suffered from persistent symptoms that lasted for a year or more" the verb forms following the dash are illogically referring back to cardiac disease. Take "and suffered from persistent symptoms that had lasted for at least a year" for instance - without the “and who” it reads like this: “patients whose cardiac disease was not well controlled and suffered…” The suffered is not referring back to patients but is necessarily part of the “whose” clause and is commanded illogically by “cardiac disease”. Only "and who suffered persistent symptoms that had been lasting for at least a year" corrects this issue - that choice should be a major “decision points” hint to carefully analyze why the “who” might be required in this sentence. Answer is "and who suffered persistent symptoms that had been lasting for at least a year".