This sentence misuses the word "credulous," which means gullible. It is clear from the phrase "since he would always break his promises" that the sentence means not trustworthy. This is the definition of "credible," which is the correct answer.

This sentence misuses the word "invent," which means to create. What is meant in this sentence is the arrival, which is the meaning of the word "advent." No punctuation is necessary because this is a simple sentence. Technically, you could use commas to separate the phrase "like the GoPro," because it can function as a parenthetical expression: a phrase that explains more about a particular word or phrase in the sentence, but is not introduced by a relative pronoun; however, the correct punctuation is not available as a choice here. The correct choice is, "The advent of products like the GoPro have made."

This sentence misuses the word "affect," which is a verb meaning to change. It is clear from the context of the sentence, however, that a change (noun) is meant here. The word "effect" is the correct choice. Furthermore, there should not be a comma before "and" because "emotions and how we act" is not a list (lists contain 3+ items). The correct choice is, "demonstrated effect on our emotions and how we act."

This sentence misuses the word "bemused," which means confused. It is clear from the context of the sentence, however, that Kareem does not find Kelly's jokes funny. The word "amused," meaning entertained is meant here. Note that the phrasing "was not amused" is not passive voice here because "amused" is an adjective, linked to Kareem by the linking verb "was." The correct choice is, "was not amused by Kelly's awful jokes."

This sentence misuses the word "criteria," which is plural. The word "only" dictates that the word following it must be singular. The singular form of "criteria" is criterion. The correct choice is, "the test is the only criterion for the position."

This sentence misuses the word "ironic," which means contrary to what is expected. Since the latter half of the sentence states that other believed that she would obtain the part, it is most likely that "unfortunate," meaning not lucky, would be the correct choice since it is likely that people wanted Julie to get the part. The correct choice is, "unfortunate."

This sentence misuses the word "parameter," which means a variable (something that changes). The second half of the sentence uses the word "border," which indicates that "perimeter," which means a border, is the correct choice. The answer is, "The perimeter of the compound."

This sentence misuses the word "affect," which is a verb meaning to cause a change. The appropriate word here is "effect," which is a noun meaning a change. No other changes are necessary; the correct answer is, "The effects of such a large company."

This sentence misuses the word "hone," which means to sharpen. The correct phrasing would be to "home in," but note that the answer choices does not include the "in" after the word "home," which changes the meaning of the word to a house, instead of the action meant here. It can be concluded from the context of the sentence that the officers want to surround/close in on the suspect. "Converge," which means this, is the correct choice ("Diverge" means to separate). 

This sentence misuses the word "affect," which is a verb means to cause a change. The context of this sentence indicates that the noun, "effect," meaning a change, should be used here. The correct choice is, "Her book had an enormous effect on companies around the world."