You will be given a definition of a task first, then some input of the task.
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: propulsion is used for flying by a spacecraft, Fact2: And thrust is generated by the propulsion system of the aircraft., Question: What is thrusting energy good for? (A) strength (B) fish (C) Moving really slowly (D) ecosystem (E) counterop (F) Flying (G) cows (H) Sleeping
Output:
F