PSAT Reading Question 216: Answer and Explanation

Question: 216

Why does the author mention multiple sclerosis at the end of the text?

• A. The passage explains how neurons work. The author is giving a supporting detail for an alternative topic, how neurons do not work properly.
• B. Multiple sclerosis is one of the main ideas. It was implicit throughout the passage until the author makes it explicit at the end.
• C. The author needed to mention a specific disease to have the passage be considered a medical science article.
• D. The description of multiple sclerosis matches the diagram of the neuron provided.

Correct Answer: A

Explanation:

A. The author is providing more complete overview of the topic. After detailing how neurons function, the author is providing details and examples for the reader about how neurons may not work. See Lesson: Main Ideas, Topic Sentences, and Supporting Details.