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: 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
[EX A]: B

[EX Q]: Fact1: fossils are formed when layers of sediment cover the remains of organisms over time, Fact2: Plants and animals are organisms., Question: What forms when plants are covered in layers of sediment over time? (A) Conifers (B) watershred (C) fossils (D) H2O (E) Echinoids (F) bubbles (G) loose soil (H) bones
[EX A]: C

[EX Q]: Fact1: Some birds are pollinators that co-evolved with plants., Fact2: Insects and birds pollinate our crops., Question: what pollinate plants? (A) insects (B) spores (C) horses (D) trees (E) goats (F) seeds (G) Wind (H) animals
[EX A]:
A