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").
Q: Fact1: using a car causes pollution, Fact2: Acid rain is caused by pollution., Question: Emission from cars contribute to which weather phenomenon? (A) smog tornadoes (B) acid rain (C) deforestation (D) flooding (E) carbon emission hurricanes (F) Tropical (G) low sea levels (H) climate
A:
B