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]: Jamaican natives have a dark skin tone do to (A) lack of nutrients (B) camouflage (C) solar radiation (D) their diet
[EX A]: C

[EX Q]: Being a nonrenewable resource means coal (A) is highly sought after as an alternate energy source (B) can be replaced and replenished with enough time (C) the industry one day will cease to exist (D) is flourishing with an unending supply
[EX A]: C

[EX Q]: some humans live in (A) volcanoes (B) bombs (C) constructed environment repellents (D) leaves
[EX A]:
C