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: friction causes an object to lose energy, Fact2: Objects An object can be one of several things., Question: What does friction cause things to lose? (A) heat (B) moisture (C) toughness (D) Energy. (E) traits (F) light (G) energy (H) cartilage
Example Output: G

Example Input: Fact1: Active immunity results when an immune response to a pathogen produces memory cells., Fact2: Vaccination is Active Acquired Immunity., Question: What results when an immune response to a pathogen produces memory cells? (A) anemia (B) vaccination (C) kill them (D) competition (E) lie detectors (F) rapid expansion (G) killing insects (H) it needs them
Example Output: B

Example Input: Fact1: hibernation is used for conserving energy by some animals, Fact2: Bears use the fat as energy over the winter hibernation., Question: Why do bears hibernate? (A) use greater resources (B) one celled organisms (C) they are lazy (D) conserve energy (E) When it's cold (F) hard outer covering (G) hydration (H) more sleep
Example Output:
D