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: water vapor cooling causes that water vapor to condense, Fact2: Clouds form by the condensation of water vapor., Question: What can form when water vapor cools? (A) Chimneys (B) Evaporation (C) chemicals (D) streams (E) Wind (F) Organic nutrients (G) Clouds (H) mildew
Student:
G