Q: 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: biofuel is used to produce electricity by burning, Fact2: Ethanol is the most widely used biofuel today., Question: what is used to produce electricity by burning? (A) air (B) heat (C) energy (D) cells (E) calcite (F) hydrogen (G) fire (H) ethanol
A:
H