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: the type of material through which sound passes changes the speed at which sound travels, Fact2: On a molecular level, a fibrous material can also slow the speed of transmission of sound., Question: What will happen when sound passes through a fibrous material? (A) heating (B) friction (C) swelling nodes (D) protection (E) amount of heat (F) feedback (G) Slows down (H) Unsafe
Output:
G