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: Most dental variations are polygenic, that is controlled by several genes., Question: Skin color is a trait controlled by what? (A) prokaryotic cells (B) one gene (C) enzymes (D) keratin (E) one's descendants (F) several genes (G) the environment (H) a single gene
[A]: F


[Q]: Fact1: Many consumers feed at more than one trophic level., Fact2: Consumers are heterotrophs that feed on tissues of other organisms., Question: What may eat other organisms at more than one trophic level? (A) barnacles (B) chickens (C) fur seals (D) humans (E) heterotrophs (F) mammals (G) animals (H) rabbit
[A]: E


[Q]: Fact1: landfills have a negative impact on the environment, Fact2: Less garbage goes into landfills., Question: What effect would less garbage have on the environment? (A) It decreases (B) lowered energy cost (C) an unknown effect (D) no effect (E) protect them (F) a better effect (G) reduced heat (H) a worse effect
[A]:
F