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]: 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


[Q]: Despite what some think, instead  around themselves, our planet spins around (A) pluto (B) the moon (C) the milky way (D) the sun
[A]: D


[Q]: Precipitation sometimes leads to (A) mountains (B) earthquakes (C) volcanoes (D) caves
[A]:
D