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: propulsion is used for flying by a spacecraft, Fact2: Apollo 13 spacecraft is launched., Question: What was used to fly Apollo 13? (A) weater (B) warmer air (C) oxygen (D) Otoacoustic (E) lethargy (F) foot power (G) propulsion (H) fluid
Output:
G