Given the task definition and input, reply with output. 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: wiring requires an electrical conductor, Fact2: Copper is a much better conductor., Question: What does most wiring require? (A) water (B) fire (C) copper (D) heat (E) Proteins (F) tube (G) batteries (H) energy
C