Detailed 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").
Problem:Fact1: dew is formed when water vapor condenses over night, Fact2: Dew point is the temperature at which dew forms., Question: What about the temperature may cause water vapor to condense overnight and in the early morning? (A) It reaches the dew point (B) It reaches Kelvin point (C) Movement of an air mass (D) Warm air moving into cold air (E) It reaches evaporation point (F) Temperature changing (G) preventing heat transfer (H) It is too dark to measure
Solution:
A