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: condensing means changing from a gas into a liquid by reducing heat energy, Fact2: When a gas condenses to form a liquid it absorbs heat., Question: What does reducing heat change gas into? (A) water (B) solutes (C) energy (D) rock (E) sweating (F) tube (G) liquid (H) freon
[EX A]: G

[EX Q]: Fact1: Cells vary in size as well as shape, but all cells are very small., Fact2: Basic unit of the plant body is the cell., Question: What may vary in size as well as shape, but all are very small? (A) keeping food fresh for long periods of time (B) disease-causing microorganisms (C) A solid geometric shape (D) Unequal radiation absorption (E) Small countries. (F) Shapewear. (G) A water well. (H) Basic units of the plant body.
[EX A]:
H