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: when metal conducts heat , that metal expands, Fact2: Conduction is the passing of heat through a medium., Question: What happens to metal when heat passes through it? (A) It sheds a layer of rust (B) kinetic energy (C) It expands (D) It turns into gold (E) electricity (F) mechanical (G) sweating (H) It contracts
Output:
C