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").

[EX Q]: Fact1: Bottleneck effect occurs when a population suddenly gets much smaller., Fact2: Fishing pressure is relatively low due to a smaller human population., Question: What can make the bottleneck effect occur in fish? (A) increased habitat (B) acid rain (C) humans (D) Winter (E) increased food (F) storms (G) increased resources (H) Toxicity
[EX A]: C

[EX Q]: Fact1: if all members of a species cannot produce offspring then that species will likely become extinct, Fact2: Avian species are less likely to become extinct if they are common across large ranges., Question: Avian species are less likely to end up extinct if they what? (A) single-celled organisms (B) important habitats (C) abandon habitats (D) stop reproducing (E) animals with backbones (F) produce offspring (G) population movement (H) destroy offspring
[EX A]: F

[EX Q]: Fact1: decomposition increases amount of organic matter in soil, Fact2: Composting is simply the natural decomposition of organic matter., Question: What increases the amount of organic matter in soil? (A) raining (B) shedding (C) mussels (D) raking (E) herbicide (F) fossil fuels (G) green manures (H) composting
[EX A]:
H