PSAT Reading Question 520: Answer and Explanation

Question: 520

Which option gives the best evidence for the answer to the previous question?

• A. Lines 13–15 ("Phagocytosis . . . vasodilation")
• B. Lines 21–23 ("Following . . . steps")
• C. Lines 32–34 ("Epithelial . . . wound is")
• D. Lines 36–37 ("The new . . . hardens")

Correct Answer: D

Explanation:

(D) Lines 35–38 give the timeline for the longest-lasting stage—up to two years. Therefore, we know that even the worst wounds should be healed in just over two years, making 1,000 days a reasonable estimate. Choices (A) and (C) give the timeline for much faster steps, but they don't give a reasonable estimate of the whole timeline. Choice (B) doesn't discuss time.