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: cooking food requires adding heat energy, Fact2: Cooked foods are easier to digest., Question: What does heat energy do? (A) igniting fuel and oxidiser (B) The bending of a ray of light (C) makes digestion easier (D) It gets heated up (E) Movement of an air mass (F) move to different locations (G) enormous damage to homes (H) to move people
Output:
C