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]: Drinking cola daily removes layers from the surface of (A) enamel on molars (B) spoons (C) porcelain (D) the coffee pot
[EX A]: A

[EX Q]: This animal thrives while the sun is down (A) the bull shark (B) the snowy owl (C) the prairie dog (D) the spotted giraffe
[EX A]: B

[EX Q]: If an organism dies what happens to that organisms population? (A) relaxes (B) cries (C) increases (D) subsides
[EX A]:
D