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: an aquatic animal requires great amounts of water to survive, Fact2: Beavers are primarily aquatic animals., Question: what requires great amounts of water to survive (A) sunlight (B) beavers (C) octopus (D) mussels (E) trout (F) carbon (G) oxygen (H) amphibians

A: B
****
Q: Fact1: soil is formed by rocks eroding, Fact2: Rivers erode the rocks they flow over., Question: What is formed by rivers? (A) fish (B) soil (C) rain (D) bamboo (E) spring (F) clouds (G) kayaks (H) NaCl

A: B
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Q: Fact1: temperature changing can cause phase changes, Fact2: If climate changes and temperatures rise, there are a number of potential effects., Question: What phase change are we experiencing now? (A) solid, liquid, gas (B) Climate change (C) Freezing temperatures (D) Apocalyptic (E) population movement (F) global warming (G) gene flow (H) Warm air

A:
B
****