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: Which of the following most likely led to certain rocks having less friction? (A) a babbling brook (B) people (C) a light wind (D) money

A: A
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Q: Locusts historically always affect crops (A) in the sky (B) disadvantageously (C) near water (D) positively

A: B
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Q: Which list contains all satellites? (A) a plane and a helicopter (B) Venus and the Kuiper belt (C) space shuttles and rocket launch platforms (D) the ISS, the moon, Europa

A:
D
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