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: 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

Example Input: Fact1: if weather is stormy then there is a greater chance of rain, Fact2: Rain is our usual form of precipitation., Question: If the weather is stormy, there is a greater chance for what? (A) nightfall (B) precipitation (C) sunshine (D) negative feedback (E) daylight (F) air pollution (G) trucks and cars (H) miles per hour
Example Output: B

Example Input: Fact1: heating an egg causes a chemical reaction in the egg, Fact2: Heat is very important in cooking., Question: What does cooking an egg cause? (A) depress neuronal excitability (B) hatching of the egg (C) melting of the egg (D) Something that causes allergies (E) freezing of the egg (F) chemical reaction in the egg (G) death and devastation (H) DNA damage and mutations
Example Output:
F