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]: if a chemical reaction occurs, it might have been triggered by which of these? (A) a person yelling at it (B) a person walking by it (C) a person looking at it intently (D) a person cranking up the room heater
[A]: D


[Q]: A sunburn is most likely to happen after hiking in a (A) desert (B) forest (C) wetland (D) jungle
[A]: A


[Q]: A desert environment can support (A) fish (B) banana trees (C) redwoods (D) insects
[A]:
D