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]: insulation for the purposes of moving electrons involves (A) conductor wrapped wire (B) insulator wrapped insulator (C) non coated metal (D) insulation encompassed wire
[A]: D


[Q]: Someday, the ground under the pile of rotting grain in the field will be (A) barren (B) a hole (C) more fertile (D) less fertile
[A]: C


[Q]: How long did it take the Grand Canyon to form? A (A) few amount of days (B) very lengthy amount of time (C) couple of billion dollars (D) very few amount of minutes
[A]:
B