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: an organism requires energy for growth, Fact2: Blood flows to the viscera, organs and tissues, for growth and metabolism., Question: What does an organism require for blood flow to viscera, organs, and tissues? (A) Collagen (B) Proteins (C) energy (D) Energy. (E) food (F) blood (G) hormones (H) nutrients
Output:
C