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: when sound reaches the ear , that sound can be heard, Fact2: Nevertheless, the sharpest sounds are perceived in the brain., Question: What is processed when it reaches the brain? (A) microwaves (B) food (C) antigen (D) noise (E) RNA (F) radiation (G) xrays (H) insulin
Output:
D