Detailed Instructions: 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").
Q: Fact1: electricity is used as an energy source by electrical devices, Fact2: Sunlight can be converted to electricity., Question: What can be used as an energy source by devices? (A) friction (B) sunlight (C) heat (D) sun's heat (E) Light (F) cells (G) wind (H) oxygen
A:
B