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: preventing the transfer of heat from an organims 's body causes that organism to keep warm, Fact2: Body heat is trapped in the haircoat., Question: The haircoat of a dog is useful for (A) recovery time from fatigue (B) When it's cold (C) protect them (D) finding bones (E) preventing dog days (F) keeping the dog warm (G) keeping the dog cool (H) water conservation
[A]: F

[Q]: Fact1: volcanic ash in the atmosphere decreases the temperature by blocking the sun, Fact2: Ash clouds are a particular problem for aircraft., Question: What are particular problems for aircraft in the atmosphere? (A) transportation (B) clog airways (C) extremely low humidity (D) volcanic clouds (E) feedback mechanisms (F) negative feedback (G) gas spreads in the air (H) very complex
[A]: D

[Q]: Fact1: burning fossil fuels increases the carbon in the atmosphere, Fact2: More carbon in the atmosphere means atmospheric warming., Question: What causes global warming? (A) Oceans rising (B) Deforestation (C) Greenhouse gasses (D) Burning fossil fuels (E) Greenhouse gases (F) Movement of an air mass (G) Leaving lights on (H) tectonic plates coliding
[A]:
D