Teacher: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").
Teacher: Now, understand the problem? Solve this instance: Fact1: propulsion is used for flying by a spacecraft, Fact2: Propulsion means to push forward or drive an object forward., Question: A push forward is used for what by a spacecraft? (A) beeping (B) Navigate (C) flying (D) distance (E) sitting (F) reversing (G) travel (H) safety
Student:
C