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").
Input: Fact1: coal is used to produce electricity by burning in coal-fire power stations, Fact2: Like coal, petroleum is a fossil fuel., Question: What are used to produce energy by burning? (A) fossil fuels (B) cigarettes (C) organic molecules (D) Firecrackers (E) carbon dioxide (F) atoms (G) dust (H) batteries
Output:
A