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: a radio converts electrical energy into vibrations, Fact2: Electric energy is stored in batteries., Question: What does a radio use to make vibrations? (A) waves (B) rays or beams (C) a battery (D) an object (E) barrel-shaped (F) nerves (G) Loud noises (H) it needs them
Output:
C