Given the task definition and input, reply with output. 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: the digestive system breaks food into nutrients for the body, Fact2: Tapeworms have no digestive system and consist primarily of a reproductive system., Question: What breaks food into nutrients for the body? (A) Fully cooking the oysters (B) secretion of acids and bases (C) Eating and drinking (D) the most widely used biofuel (E) the stage of citokinesis (F) To conserve energy (G) Something that tapeworms do not have (H) hydration of their cells
G