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: Skin color is another polygenic trait., Fact2: Tourette syndrome a polygenic disorder ., Question: what is tourette syndrome? (A) malaria (B) cancer (C) trait (D) fever (E) cell (F) antigen (G) virus (H) Type O
[A]: C


[Q]: Fact1: lungs are used for breathing air by land animals, Fact2: Elephants are the largest animals on land., Question: What uses lungs for breathing air? (A) rocks (B) some mammals (C) Frogs (D) monotremes (E) humans (F) bacteria (G) elephants (H) oak trees
[A]: G


[Q]: Fact1: using a gasoline engine requires burning gasoline, Fact2: Fossil fuels include coal, oil, natural gas, and gasoline., Question: What does an engine require burning? (A) Time and energy (B) energy (C) wind (D) water (E) carbon dioxide (F) layers of fat (G) fossil fuels (H) sunlight
[A]:
G