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").
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Question: Fact1: decomposition increases amount of organic matter in soil, Fact2: Fungi are involved in decomposition, as well., Question: What can help increase the amount of organic matter in soil?  (A) Fungi (B) mussels (C) pine (D) worms (E) animals (F) Enzymes (G) solutes (H) trees

Answer: A


Question: 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

Answer: F


Question: Fact1: Mammals have a layer of fat under the skin to help insulate the body., Fact2: Pugs are mammals and mammals shed., Question: what have a layer of fat under the skin? (A) Birds (B) humans (C) trees (D) pugs (E) mounds (F) cats (G) otters (H) bones

Answer:
D