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: Quartz can very easily damage (A) smelted silica (B) granite (C) diamonds (D) steel

A: A
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Q: An early example of harnessing wind power would be (A) unicorns (B) santas flying reindeer (C) trumps windy speeches (D) cloth on masts

A: D
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Q: A boy is standing in the bathroom brushing his teeth, but the lights are off in the bathroom. However, his room is next to the bathroom and his bedroom light is on. The bathroom is still bright, because the mirror reflects (A) light from a car (B) light from the sun (C) light from the bathroom (D) light from the bedroom

A:
D
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