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: safety goggles are used for protecting the eyes during experiments, Fact2: Firm plastic eyeglasses or goggles are better., Question: What protects the eyes during experiments? (A) magnesium (B) Chemicals (C) Vibrissae (D) Type O (E) Rolex (F) plastic (G) water (H) wind
[EX A]: F

[EX Q]: Fact1: Temperature falls from lower to higher altitudes., Fact2: If the weather is warm, their temperature rises., Question: What falls from lower to higher altitudes? (A) warm weather (B) sun's heat (C) rainfall (D) heat energy (E) kinetic energy (F) water vapor (G) colder and wetter (H) Greenhouse gasses
[EX A]: A

[EX Q]: Fact1: gills are used for breathing water by aquatic animals, Fact2: Crustaceans are predominantly aquatic, breathing by means of gills., Question: Crustaceans breathe what through their gills? (A) matter (B) water (C) saliva (D) gametes (E) semen (F) liquid (G) oxygen (H) air
[EX A]:
B