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: Music is sound, sound is energy., Question: what can be heard when it reaches the ear? (A) h2o (B) music (C) fluid (D) hail (E) earlobes (F) nectar (G) fumes (H) gamma rays
Output:
B