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: Most amphibians breathe with gills as larvae and with lungs as adults., Fact2: All frogs are amphibians., Question: What do frogs breathe with when they are adults? (A) skin (B) fins (C) lungs (D) oxygen (E) gills (F) air (G) Energy (H) Gases
[EX A]: C

[EX Q]: Fact1: an animal usually requires a warm body temperature for survival, Fact2: Squirrels hide and sleep in a secret warm place all winter., Question: What requires hiding and sleeping for survival? (A) bacteria (B) rice (C) amphibians (D) organisms (E) Frogs (F) trees (G) humans (H) animals
[EX A]: H

[EX Q]: Fact1: a solution is formed by one substance being dissolved in another substance, Fact2: An unsaturated solution is a dilute solution., Question: What is it called when two substances are dissolved? (A) Dilution (B) Bodily water (C) vaporization (D) watershred (E) thirst (F) bamboo (G) Condensation (H) salinity
[EX A]:
A