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:
A hatched chick will know how to construct a nest when it needs to because it is (A) instinctual (B) considerate (C) learned (D) a given

Ex Output:
A


Ex Input:
A light using energy can cease that activity when (A) light bulbs are gold (B) lights are always on (C) wall switch is adjusted (D) walls are painted blue

Ex Output:
C


Ex Input:
You'll know that the sun has set if (A) a baby is sleeping (B) all the birds are silent (C) the temperature has gone down (D) the brightest thing in the sky is a satellite

Ex Output:

D