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: Amphibians have permeable skin that easily absorbs substances from the environment., Fact2: All frogs are amphibians., Question: What has permeable skin? (A) goats (B) alligators (C) animals (D) apples (E) frogs (F) sharks (G) humans (H) snakes
[EX A]: E

[EX Q]: Fact1: unequal heating of Earth 's surface by the Sun causes global wind patterns, Fact2: Wind belts in the Atlantic Ocean include the trade winds and the prevailing westerlies ., Question: What causes the westerlies? (A) flow of electrons (B) Ocean currents (C) Precipitation (D) to move people (E) Drought (F) scattered light (G) Uneven heating by the sun (H) exposure to cold
[EX A]: G

[EX Q]: Fact1: Soil can be depleted of nutrients., Fact2: Potassium carbonate is a valuable nutrient for plants., Question: Soil can be depleted of which of the following? (A) Potassium carbonate (B) Chlorophyll (C) neon (D) sedimentary rocks (E) carbon monoxide (F) helium (G) Organic compounds (H) vegetation
[EX A]:
A