A
Below is a question with multiple-choice answers. Choose the correct option based on your reasoning.

### Question:
Denise was driving east over a hill in the afternoon, shortly after a rain shower. Suddenly the sun broke through the clouds, and she saw a rainbow ahead of her. Which of the following made the rainbow possible?

### Choices:
A. Sunlight can be separated into all the colors of the rainbow.
B. Water reflects sunlight like a mirror to make it look colored.
C. Overhead black clouds reflect in puddles to cause a mirage.
D. Air pollution causes the sky to look colored under these conditions.

### Answer:
