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]: A man will most likely be unable to see if he gets lost in (A) a dense forest (B) a long river (C) a desert (D) a mountain
[EX A]: A

[EX Q]: Though fossil fuels and their byproducts will eventually be used up completely, we'll still have (A) gasoline (B) coal (C) plastics (D) light from stars
[EX A]: D

[EX Q]: The circulatory system brings oxygen to the body from where? (A) brain (B) chest (C) hands (D) stomach
[EX A]:
B