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: the emission of sulfur dioxide causes acid rain, Fact2: The sulfur dioxide is converted into sulfuric acid., Question: what causes acid rain? (A) gases (B) rainfall (C) Pollution (D) fossil fuels (E) emissions (F) vehicles (G) burning (H) wind
[A]: E


[Q]: Fact1: soil erosion means soil loss through wind, Fact2: Soil erosion is one of the leading causes of water pollution in the United States., Question: What is one consequence of soil loss? (A) Decrease bodily water (B) humans disturb it (C) drying out (D) flooding (E) contamination (F) deforestation (G) chemical changes (H) Water pollution
[A]: H


[Q]: Fact1: mechanical weathering is when rocks are broken down by mechanical means, Fact2: Mechanical weathering produces detritus., Question: What is formed when rocks break down? (A) plants (B) clouds (C) sand (D) coastlines (E) detritus (F) deltas (G) water (H) alluvial
[A]:
E