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: wiring requires an electrical conductor, Fact2: Metals are conductors of electricity., Question: what does wiring require? (A) waves (B) heat (C) energy (D) protons (E) metal (F) neutrons (G) gravity (H) fibers
Output:
E