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: a firecracker converts chemical energy into sound, Fact2: Fireworks are illegal, including firecrackers., Question: What converts chemical energy into sound? (A) a firework (B) sensory neurons (C) Gunshots (D) a bottle (E) a battery (F) animals (G) a flashlight (H) engines
Output:
A