Q: 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: harming an animal species causes that animal 's population to decrease, Fact2: Pollution from garbage can harm cave animals., Question: How can pollution from garbage affect cave animals? (A) increase populations (B) reduce populations (C) attract predators (D) Pesticides (E) Make them lose their sight (F) Plant growth is reduced (G) organisms and their habitat (H) cause their death
A:
B