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").

[EX Q]: 2000 years ago, this method would likely have brought sand from the coast to the desert (A) the pyramids often eroded, making their own sand (B) constant breezes over time (C) human automobiles transfer materials (D) the space shuttle moved sand great distances
[EX A]: B

[EX Q]: A shoe seems gold and green at first, then at second glance looks blue and silver. This could be due to (A) interrogation (B) comas (C) refractions (D) cellulite
[EX A]: C

[EX Q]: If the days are more chilled than before, and yet still avoid freezing degrees, a likely assumption is that (A) daylight lasts longer (B) daylight has lessened (C) daylight is brighter (D) nights are shorter
[EX A]:
B