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: a greenhouse is used to protect plants by keeping them warm, Fact2: Flower size varies by plant., Question: How does a greenhouse protect flowers? (A) keeps them away from the sun (B) keeps them warm (C) keeps them out of soil (D) an external framework (E) it needs them (F) keeps them cold (G) rays or beams (H) by indirect light

A: B
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Q: Fact1: Adult worms go through a major transformation to develop reproductive organs., Fact2: An enlarged cummerbund-like band near the worm's head holds the reproductive organs., Question: What grows a cumberbund-like band around itself in adulthood? (A) legumes (B) Bats (C) mammals (D) bamboo (E) swea (F) worms (G) fungi (H) bushes

A: F
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Q: Fact1: darkness has a negative impact on photosynthesis, Fact2: For example, the sun releases energy needed to drive photosynthesis., Question: Darkness has what sort of impact on the energy the sun releases?  (A) ligt (B) forces (C) Light (D) Temperature (E) heat energy (F) photons (G) sunlight (H) Negative

A:
H
****