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: a firecracker converts chemical energy into sound, Fact2: Sound waves vibrate., Question: a firecracker converts chemical energy into what? (A) kinetic energy (B) Loud noises (C) vibrating waves (D) An object is seen (E) electromagnetic energy (F) deoxyribonucleic acid (G) hydrogen and oxygen (H) harmful substances
Output:
C