Given the task definition and input, reply with output. 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").

Fact1: using a car causes pollution, Fact2: Pollution is anything that spoils the environment., Question: What hurts the environment? (A) Solar flare (B) wind (C) cars (D) storms (E) carbon (F) time (G) oil (H) trees
C