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: 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
Example Output: H

Example Input: Fact1: threatening behavior by predators causes a porcupine to extend its quills, Fact2: Puffers are smooth skinned while Porcupines have the characteristic spines or quills., Question: What does a porcupine do with its spines when it's threatened? (A) killing insects (B) Shoot them (C) kill them (D) protect them (E) Extend them (F) Shed them (G) Retract them (H) behave
Example Output: E

Example Input: Fact1: Earthworms are important deposit feeders that help form and enrich soil., Fact2: Earth stands for soil, dust or ground., Question: An earthworm is an important (A) allow growth (B) cleaner for earth (C) Plant reproduction (D) more abundant (E) parasite (F) Something that makes plants green (G) predator (H) deposit feeder for earth
Example Output:
H