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: oil is formed by layers of sediment pushing down on decomposing algae, Fact2: When the algae dies it is decomposed by bacteria., Question: Oil is formed by layers of sediment pushing down on what? (A) bacteria (B) nutrients (C) amoebae (D) tunicates (E) oysters (F) coral reefs (G) mussels (H) Bodily water

A: A
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Q: Fact1: sound can be used for communication by animals, Fact2: Sounds are vibrations in air., Question: Vibrations in air can be used for what by animals? (A) activation energy (B) communication (C) Something to move (D) sleeping (E) sustenance (F) Heart rate (G) food and shelter (H) tasting

A:
B
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