Definition: 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: Chemical digestion occurs mainly in the small intestine., Fact2: Chemical digestion breaks complex chemicals into simple ones., Question: Complex chemicals break down into simple ones mainly in the _. (A) mild heating process (B) Seconds and minutes (C) unicellular organisms (D) tropical cyclone (E) angiosperm (F) small intestine (G) Laboratory (H) paramecium
Output:
F