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").

[EX Q]: Fact1: coal is used for generating heat by burning, Fact2: Gasoline is extremely flammable and can explode and burn if ignited., Question: coal is used for generating heat and can what? (A) melt (B) explode (C) run (D) kill (E) heat (F) energy (G) stay warm (H) freeze
[EX A]: B

[EX Q]: Fact1: Behaviors that improve fitness increase through natural selection., Fact2: Fitness traits relate to an animal s ability to survive and reproduce., Question: behaviors increase through what that improve traits of animal's ability to survive (A) competition (B) hunting (C) biological diversity (D) the environment (E) eating (F) produce offspring (G) natural selection (H) grooming
[EX A]: G

[EX Q]: Fact1: natural magnetism is used for pointing north by a compass, Fact2: For the ordinary compass, align to the North direction., Question: What do compasses use to point? (A) pressure (B) their speed (C) a metal (D) wind (E) magnetism (F) GPS (G) distal (H) lamphreys
[EX A]:
E