Detailed Instructions: 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").
Problem:Fact1: protein is used to repair cells by the human body, Fact2: Protein is necessary for growth and repair., Question: what is required for cell growth? (A) microscope (B) nitrogen (C) protein (D) carbohydrates (E) fat (F) nucleus (G) energy (H) Enzymes
Solution:
C