Given the task definition and input, reply with output. 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: blowing air into a whistle causes air to vibrate inside the whistle, Fact2: When an object moves or vibrates, the air molecules around the object also vibrate., Question: Blowing air into what causes air to move inside it? (A) heat (B) solid plastic (C) solid glass (D) solid rock (E) whistle (F) sound (G) a chime (H) waves
E