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: 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
[A]: A

[Q]: Fact1: Reproduction is the process by which organisms give rise to offspring., Fact2: Then, the lowest energy offspring are used as parents for the next generation., Question: The next generation of an organism rises via: (A) Plants growth (B) spontaneous generation (C) reproduction (D) The Sun (E) revolution (F) sun's heat (G) heat energy (H) unions
[A]: C

[Q]: Fact1: Humans have collected and grown mushrooms for food for thousands of years., Fact2: Mushrooms are an example of fungi., Question: Humans have collected and grown what for food for thousands of years? (A) plants (B) fungi (C) ferns (D) cheese (E) fungus (F) salmon (G) hamburgers (H) primates
[A]:
B