PSAT Reading Question 500: Answer and Explanation

Question: 500

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

• A. Lines 9–11 ("Even so . . . overlooked")
• B. Lines 17–21 ("Notably . . . bacteria")
• C. Lines 26–29 ("As it is . . . cells")
• D. Lines 37–39 ("The startling . . . future")

Correct Answer: C

Explanation:

(C) The correct answer is choice (C) These lines state that antibiotics work by targeting something present strictly in bacteria. Choice (A) doesn't discuss antibiotics. Choice (B) merely mentions that a fungus led to the development of three classes of antibiotics. Choice (D) references antibiotic resistance but not what makes antibiotics effective.