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 for generating heat by burning, Fact2: Coal arrives at the power station coal handling area., Question: generating heat by what occurs at power stations (A) waves (B) wind (C) burning (D) engines (E) Fuel cells (F) sweating (G) Electrical (H) energy
Output:
C