PSAT Reading Question 497: Answer and Explanation

Question: 497

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

• A. Lines 17–21 ("Notably . . . bacteria")
• B. Lines 30–33 ("Even into . . . species")
• C. Lines 43–47 ("Of particular . . . disease")
• D. Lines 54–57 ("Not unlike . . . health")

Correct Answer: D

Explanation:

(D) The correct answer is choice (D) because these lines state that both Alexander Fleming and Akira Endo made their discoveries serendipitously, meaning with a bit of chance or luck. Choice (A) talks about how Fleming's discovery contributed to science, but none of the answer choices from the previous question apply. Choice (B) talks about how widespread use of antibiotics contributed to antibiotic resistance—not exactly a medical innovation. Choice (C) simply defines statins.