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:
Cows know there is salt in a mineral lick because (A) they have receptors on their tongue that allow them to experience spice and seasonings (B) a cow in the ocean told them it was there (C) it's on their side of the pasture's fence (D) they evolved where there were great redwood trees

Ex Output:
A


Ex Input:
When the old man was much younger, he still had (A) brown eyes (B) baldness (C) gray hair (D) wrinkled skin

Ex Output:
A


Ex Input:
A boy is playing with his toy boat in his wading pool. His mother comes along and sprays more water into the pool. (A) the boat flies (B) the boat swims (C) the boat drowns (D) the boat rises

Ex Output:

D