This a simile. This is because a simile uses like or as to compare two things. A metaphor doesn't use like or as, but it still compares things.
Answer: (C) They preview the passage topics.
I took the test.
Answer:
I’d never believe the day I would find someone so kind like this one person. On a Sunday morning I decided to go to a park for some fresh air, as I got there I noticed a puppy who looked homeless. As I took a closer look I saw a stranger walk up to the puppy and give it some food and water, it was a small gesture but it must’ve meant a lot to the puppy. Not many people do that in my town so I could tell that the stranger had a heart of gold! I’ve never found such a kind person ever since.
Explanation: