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: Veins generally carry deoxygenated blood., Fact2: Arteries and veins are blood vessels., Question: what generally carries deoxygenated blood? (A) blood vessels (B) animals (C) layers of fat (D) mammals (E) critical organs (F) an organism's body (G) elephants (H) athletes

A: A
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Q: Fact1: building housing developments usually requires replacing animal habitats, Fact2: For salmon, habitat includes freshwater, estuarine and marine habitat., Question: What animal would not have its territory covered over by a housing development? (A) humans (B) bullfrogs (C) Frogs (D) raccoon (E) pigeons (F) salmon (G) opossum (H) deer

A: F
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Q: Fact1: air pollution can cause the pH of soil to decrease, Fact2: Highly acid soil is detrimental to crop growth and biological activity in soil., Question: Crop growth can be negatively impacted by (A) fossil fuels (B) light pollution (C) Pollution (D) drought (E) rainbow falls (F) Greenhouse gasses (G) lunar eclipse (H) air pollution

A:
H
****