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").

Fact1: a firecracker converts chemical energy into sound, Fact2: Hearing is the act of perceiving sound., Question: What converts chemical energy into what we hear? (A) Gunshots (B) An object is seen (C) a lightbulb (D) ice (E) sensory neurons (F) a firecracker (G) animals (H) a stove
F