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: Viruses are killed by objects used in a (A) backyard (B) bathroom (C) kitchen (D) living room

A: C
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Q: In a bowl of water with the sun shining on it, what happens to the water after four hours? (A) the water is growing algae (B) there is less water (C) the water is dirty (D) there is more water

A: B
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Q: When blood passes thru the primary element of the respiratory system it's diffused with (A) the first element on the periodic chart (B) a compound released by the burning of fossil fuels (C) an element released by plants (D) a compound used by plants

A:
C
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