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: when a gas in an open container evaporates , that gas spreads out into the air, Fact2: Deadly carbon monoxide gas from the generator s exhaust can spread throughout enclosed spaces., Question: carbon monoxide gas from a generator's exhaust has been what (A) transportation (B) air pollution (C) projectiles (D) destroyed crops (E) destruction (F) evaporated (G) danger (H) Car accidents
Output:
F