You will be given a definition of a task first, then some input of the task.
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: fire converts chemical energy into light and heat energy, Fact2: Early in human history, energy was first used by people for heating, lighting, and cooking., Question: Fire converts energy into something people use for what? (A) survival (B) food (C) mating (D) exercise (E) removing (F) cooking (G) warmth (H) stealing
Output:
F