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: gases from burning coal and oil dissolving in water in the atmosphere causes acid rain, Fact2: Acid rain comes from polluted clouds., Question: Gases from burning coal and and oil dissolving in the atmosphere can cause what? (A) polluted rain (B) disease (C) humidity (D) thunderstorms (E) snow (F) contamination (G) Temperature (H) harmful substances
A