Instructions: In this task, you are given two facts, and a multiple-choice question. Based on the given facts, answer the question with index of the correct option (e.g, "A").
Input: Fact1: sunlight and rain can cause a rainbow, Fact2: Rainbows are very pretty., Question: What are sunlight and rain? (A) colors (B) pretty (C) fake (D) unnecessary (E) energy (F) photons (G) Energy. (H) dry
Output:
B