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: knowledge of the stars can be used to navigate, Fact2: Star Star Generally speaking, the star is a symbol of hope and guidance in the midst of uncertainty., Question: How can we overcome uncertainty when lost? (A) feedback (B) Sleep (C) Navigate (D) vision (E) lamphreys (F) Wander (G) Pace (H) movement
Output:
C