Definition: 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: an animal needs to attract a mate to reproduce, Fact2: Animals reproduce by having young., Question: Why do animals have mates? (A) food and shelter (B) it needs them (C) to have young (D) genetic diversity (E) to be happy (F) to get married (G) to survive (H) Reproduction
Output:
C