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: Pneumonia may be caused by an infection or injury of the lungs., Fact2: Mammals breathe air with lungs., Question: What may be caused by an infection or injury of the organs used to breathe air? (A) Toxicity (B) smoking (C) fertilization (D) pneumonia (E) a broken leg (F) oxygenation (G) Dehydration (H) the skin
Example Output: D

Example Input: Fact1: Mammals can also generate little bursts of heat by shivering., Fact2: Polar bears are mammals., Question: What can generate little bursts of heat by shivering? (A) alpacas (B) bacteria (C) animals (D) polar bears (E) phytoplankton (F) rabbit (G) viruses (H) humans
Example Output: D

Example Input: Fact1: Animals may compete for territory, water, food, or mates., Fact2: Larger animals dominate in competition for food, mating partners, and nesting space., Question: Which types of animals dominate in competition for territory? (A) Large. (B) average (C) Birds (D) humans (E) Man (F) dinosaurs (G) a fish (H) small
Example Output:
A