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: In the 60's people watched on TV while for the first time people walked on (A) a high rooftop in a major city (B) a satellite without much air in our solar system (C) the edge of a cliff in the mountains (D) a beach in Brazil

A: B
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Q: As vehicles become more efficient petro consumption (A) increases (B) stops (C) decreases (D) stay the same

A: C
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Q: If a person wants to make cookies and is lacking an oven, they could place the sheet of dough on (A) a cold counter (B) a wooden stool (C) a window sill (D) a vehicle engine

A:
D
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