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: some animals' fur grows thicker for staying warm in the winter, Fact2: For one, animal fur becomes thicker and more abundant during the winter months., Question: In the winter months, animal fur is what for warmth? (A) more thin (B) more abundant (C) more dark (D) important habitats (E) protect them (F) support (G) hard outer covering (H) more sparse
A:
B