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 Input:
The sidewalk next to a house having a crack in it and having vegetation growing from it is considered? (A) insects (B) weathering (C) erosion (D) lava

Ex Output:
B

Ex Input:
If you see a mushroom on an old decaying log, its because a mushroom is a decomposer, which gets its food from (A) non-alive things (B) space (C) computers (D) the store

Ex Output:
A

Ex Input:
a person takes a dive under the sea and feels faint, with a dart stuck to them. What might have happened? (A) they encountered a cnidaria (B) they must have startled a shark (C) they came in contact with a whale (D) they encountered the wrath of Poseidon

Ex Output:
A