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: Viruses are so small that they can be seen only with an electron microscope., Fact2: Electron microscope is developed in Germany., Question: viruses are so small that they can be seen only with a device developed where? (A) A computer (B) sunlight (C) Light (D) germany (E) retina (F) at home (G) canada (H) taiwan
[A]: D


[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: when an animal moves , chemical energy is converted to mechanical energy, Fact2: Kinetic energy is energy associated with motion., Question: What do all animals do?  (A) Swim (B) Social (C) Move (D) Punch (E) fly (F) live (G) reacts (H) Kick
[A]:
C