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:
If something is in an ecosystem, it could be (A) invisible (B) vacuum of space (C) lacking life (D) alien

Ex Output:
C


Ex Input:
Which two objects would electricity best flow through? (A) a tin can and a plastic fork (B) a steel beam and a soda can (C) an eraser and a wooden pencil (D) human skin and rubber gloves

Ex Output:
B


Ex Input:
What substance covers more than sixty nine percent of the third rock from the sun? (A) Desert (B) Cities (C) Ocean (D) Forest

Ex Output:

C