Definition: 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: Soon the wind blows in fresh air., Question: What would wind going through a whistle cause? (A) vortex (B) friction (C) vibrant colors (D) waves (E) Energy. (F) kinetic energy (G) absence of sound (H) vibrations
Output:
H