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: killing microorganisms in food can be used to extend the shelf life of that food, Fact2: Cooking kills the microorganisms., Question: What can extend the shelf life of food? (A) cooking it (B) Enzymes (C) evaporation (D) rays or beams (E) running it under water (F) Proteins (G) seasoning it (H) putting it on a counter
Example Output: A

Example Input: Fact1: shelter is used for protection by animals against weather, Fact2: Caves or rock overhangs provide shelter., Question: What do animals find protection from when using rock overhangs? (A) sun's heat (B) insects (C) weather (D) erosion (E) rivers (F) bats (G) wind (H) the sun
Example Output: C

Example Input: Fact1: Skin color is another polygenic trait., Fact2: Most dental variations are polygenic, that is controlled by several genes., Question: Skin color is a trait controlled by what? (A) prokaryotic cells (B) one gene (C) enzymes (D) keratin (E) one's descendants (F) several genes (G) the environment (H) a single gene
Example Output:
F