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: moss causes chemical weathering, Fact2: Mosses Mosses are flowerless plants that grow in clumps., Question: What can cause chemical weathering? (A) Calcium carbonate (B) our nearest star (C) global warming (D) sea squirts (E) swamp vegetation (F) single-celled organisms (G) flowerless plants (H) Earthworms
[A]: G


[Q]: Fact1: Many consumers feed at more than one trophic level., Fact2: Consumers are heterotrophs that feed on tissues of other organisms., Question: What may eat other organisms at more than one trophic level? (A) barnacles (B) chickens (C) fur seals (D) humans (E) heterotrophs (F) mammals (G) animals (H) rabbit
[A]: E


[Q]: Fact1: disease has a negative impact on an organism, Fact2: Influenza, or the flu, is a contagious disease caused by a virus., Question: What has a negative impact on an organism? (A) leukemia (B) vitamins (C) minerals (D) the flu (E) smallpox (F) cancer (G) water (H) viruses
[A]:
D