Q: 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: a radio converts electrical energy into vibrations, Fact2: Sound Sound waves are caused by vibrations in the air., Question: What creates sound waves? (A) a curling iron (B) energy (C) carpet (D) animals (E) dolphins (F) Gunshots (G) a couch (H) a radio
A:
H