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]: The cultivation of a range of crop types in a specific order has a positive impact on (A) soil quality (B) water quality (C) air quality (D) atmospheric conditions
[EX A]: A

[EX Q]: Which is most harmful to a human? (A) dynamite going off (B) reading email (C) balloons popping (D) opening a soda
[EX A]: A

[EX Q]: A person wanting to avoid polluting the air will, when considering vehicles, choose (A) a four-wheeler (B) a truck (C) a convertible (D) a tricycle
[EX A]:
D