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: sound can be used for communication by animals, Fact2: Sound occurs when a body, such as a vocal chord, vibrates, or moves back and forth., Question: What use may some animals have for their vocal chords? (A) support (B) chiming (C) exoskeleton (D) courtship (E) circulatory systems (F) reading music (G) writing (H) communication
Output:
H