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").

Example Input: Fact1: a prism is used for refracting light, Fact2: Refraction is the bending of light cause by a speed change when it passes through different media., Question: What aspect of light changes when it passes from air into a prism? (A) power (B) seasons (C) speed (D) energy (E) a wave (F) Joules (G) heat (H) unique
Example Output: C

Example Input: Fact1: Most pituitary hormones control other endocrine glands., Fact2: An abnormal endocrine gland is often blamed for producing obesity., Question: pituitary hormones can be blamed for what? (A) a lot of human deaths (B) Plant growth is reduced (C) harmful substances (D) Dehydration (E) matter vibrating (F) producing obesity (G) major threat to health (H) Leptospirosis
Example Output: F

Example Input: 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
Example Output:
B