Task: Question Answering
Input (English): 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?  
 (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.
Output (English): A