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 dog's ears may be as thin as its (A) friend's (B) neighbor's (C) father's (D) owner's

Ex Output:
C


Ex Input:
Amphibians undergo changes in structure of being in that (A) salamanders can regrow their tails (B) salamanders can lose their tails (C) frogs can breathe air and water (D) they begin as a different looking being

Ex Output:
D


Ex Input:
Cells can make up components of prisons, jails, holding areas and (A) lifeforms (B) space stone (C) blue jeans (D) filtered water

Ex Output:

A