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: Proper digestion is vital for nutrient absorption., Question: What does digestion absorb? (A) food (B) lipids (C) oxygen (D) blood (E) sugar (F) O2 (G) water (H) Energy
A