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").
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Question: Drinking cola daily removes layers from the surface of (A) enamel on molars (B) spoons (C) porcelain (D) the coffee pot

Answer: A


Question: Which would create the most pollution (A) animals (B) rivers (C) smoke stacks (D) toxicity

Answer: C


Question: Rocks are most likely to kill you while (A) hiking a mountain (B) in a pool (C) at a concert (D) in a cornfield

Answer:
A