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 echo is produced by what type of reflection of sound source? (A) Direct (B) Distant (C) Varied (D) Single

A: D
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Q: The strength of a hurricane increases as moisture and what increase? (A) hotness (B) animals (C) water (D) anger

A: A
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Q: An arid sandy place has very little (A) sustenance (B) sand (C) sun (D) heat

A:
A
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