Instructions: 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").
Input: Fact1: thick fur can be used for keeping warm, Fact2: Mammals have warm blood, and fur or hair, and breathe air., Question: what do mammals keep warm with? (A) fats (B) ears (C) skulls (D) Limbs (E) food (F) tails (G) tissue (H) hair
Output:
H