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:
This can be used to light up a light bulb (A) grass (B) dirt (C) stones. (D) biofuel

Ex Output:
D


Ex Input:
A person can find a sparrow's home by (A) looking at its face (B) looking at a detailed map (C) seeing where it was born (D) noting where it frequently consumes

Ex Output:
D


Ex Input:
If a thing is going to be a planet, it must orbit in a certain amount of time, which can exclude (A) mercury (B) the ninth planet (C) the third planet (D) venus

Ex Output:

B