"Don't be scared, Anna," he insisted. "The bears can't hurt you from behind that glass."

The choice above is correct. It is the only one that properly connects quotation with the rest of the sentence. In this case, a comma is required to separate the quote; a period is not acceptable because of the lowercase "h" in "he". A period after "insisted" is required to separate the two complete sentences.

Because the sentence starts with the word "who," it should be obvious that it is a question and thus has to end with a question mark. Don't get confused by the extra phrase that describes the dog.

In the original sentence, the pronoun “she” is ambiguous. Who does it refer to? One way to fix this would be to specify the person, another (used in the correct answer here) is to change the pronoun to “they” and refer to all three people. The choices that reverse the order of this phrase are awkwardly passive, and “just getting” is an unnecessary use of progressive tense.

The sentence has a vague pronoun reference. The use of "their" before "prescriptions" is ambiguous because we do not know if "their" refers to the doctors' or the pharmacists' prescriptions. The sentence needs to clarify to whom the pronoun refers, so the best answer choice is the one that does this, "and many pharmacists regularly complain about doctors' prescriptions."

It is unclear if the “him” refers to Kennedy or Nixon. The correct answer makes it clear with whom I agree. 

The only problem with the original sentence is that “John” is repeated unnecessarily. Replacing it with a pronoun the second time is a good solution. The other answer choices switch up the coordinators, but this is not a good idea. The relationship between the two parts of the sentence is cause/effect, so “because” is appropriate, not “however” or no coordinator.

The use of the pronoun "her" in the underlined phrase is confusing, as it is not clear whether this is a new person in the sentence or refers back to the subject. To be more clear, a reflexive pronoun must be used. The correct answer is "hard on herself."

The only issue in the sentence as it is written is the use of "myself," a reflexive pronoun, when there is no other first person pronoun to which it can refer back. The only answer choice which both appropriately uses "me," and keeps the same meaning is "back to me."

The only issue with the sentence is its use of the reflexive pronoun "myself," despite not previously using a first person pronoun. All reflexive pronouns need an antecedent, or previous pronoun in the same person, to be used correctly, or it should be changed to the simple pronoun. As this is the only problem with the sentence, "given to me" is the correct answer choice.

The only issue with the sentence is the use of the reflexive pronoun "myself" without a previous use of the first person pronoun. All reflexive pronouns need to refer back to an earlier use of the pronoun in the sentence. The solution to this issue is to change "myself" to the simple "me," making "directly to me" the correct answer choice.