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: blowing air into a whistle causes air to vibrate inside the whistle, Fact2: Sounds are vibrations in air., Question: What creates sounds? (A) energy of moving objects (B) chemical messengers (C) the body's largest organ (D) peace (E) Thinking hard (F) Blowing a whistle (G) Electrical energy (H) death
Output:
F