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").

[Q]: Fact1: heat can change the state of matter, Fact2: Matter exists in a solid, liquid or gas state and can change forms., Question: _ can change liquid to gas. (A) magnetism (B) cycles (C) energy (D) vapors (E) condensation (F) gravity (G) thirst (H) Heat
[A]: H


[Q]: Fact1: Playing is one way mammals and other animals learn how to behave., Fact2: Opossums are a type of mammal called marsupials., Question: what plays to learn how to behave? (A) opossums (B) humans (C) people (D) fish (E) exercise (F) ants (G) h2o (H) catabolism
[A]: A


[Q]: Fact1: threatening behavior causes a fight-or-flight response in animals, Fact2: Dogs are highly social animals., Question: Threatening behavior causes a fight-or-flight response in what? (A) Whales (B) dogs (C) hair (D) Birds (E) humans (F) hats (G) bacteria (H) bears
[A]:
B