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").
Input: Fact1: astronauts require preserved food for extended flights, Fact2: For example, food contains Calories, units of energy content., Question: What do astronauts require for long flights? (A) problems (B) nutrients (C) glycogen (D) danger (E) energy (F) sugar (G) hydration (H) trouble
Output:
E