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: Courtship is behavior that is intended to attract a mate., Fact2: Complex courtship rituals precede mating., Question: What are behavior that is intended to attract a mate? (A) a doorbell (B) firm hugs (C) Complex rituals (D) Riding a bike (E) Behaviour modifications (F) Magnets (G) honeybees (H) Friendship
Example Output: C

Example Input: Fact1: Veins generally carry deoxygenated blood., Fact2: Arteries and veins are blood vessels., Question: Arteries in the body are able to carry what? (A) saliva (B) breathe (C) water (D) Air (E) oxygen (F) blood (G) veins (H) liquid
Example Output: F

Example Input: Fact1: Population density is the average number of individuals per unit of area or volume., Fact2: Economy is affected by population size and density., Question: What is affected by the average number of individuals per unit of area or volume? (A) goats (B) economy (C) cows (D) animals (E) vegetation (F) mammals (G) bushes (H) wind
Example Output:
B