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: dew is formed when water vapor condenses over night, Fact2: Fog happens when the water vapor condenses into particles as air temperatures cool., Question: What is formed when fog condenses over night? (A) snow (B) smog (C) dew (D) gas (E) sleet (F) fireworks (G) rain (H) lake
Output:
C