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: Freshwater biomes have water that contains little or no salt., Fact2: Freshwater biomes have suffered mainly from pollution., Question: Biomes that have suffered mainly from pollution have water that contains little or no what? (A) Toxins (B) CO 2 (C) liquid (D) salt (E) Lead (F) Carbon (G) Acids (H) sulfur
A:
D