In this task, you are given a multiple-choice question and you have to pick the correct option. Answer with option indexes (i.e., "A", "B", "C", and "D").

Q: What is a source of oxygen through photosynthesis? (A) lakes (B) car engines (C) sunflowers (D) people

A: C
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Q: Sliding off concrete and onto gravel produces higher levels of (A) shine (B) value (C) longevity (D) chafing

A: D
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Q: A dog needs to be able to sense something visually, so it makes sure it can (A) read (B) view (C) walk (D) hear

A:
B
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