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: 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

A: B
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Q: Flowers with more pollinators (A) escalate reproduction (B) increase water usage (C) increase visual appeal (D) decrease reproduction

A: A
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Q: something could get wedged during winter if which of these happens? (A) trapped water changes physical form repeatedly (B) water flows down a stream (C) water drank by a person (D) none of these

A:
A
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