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: Digestion is the process of breaking down food into components the body can absorb., Fact2: Digestive enzymes are necessary for a complete digestion., Question: What causes food to break down? (A) Blood (B) bacteria (C) Enzymes (D) Saliva (E) sodium (F) heat (G) Esophogus (H) Acids
Output:
C