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:
When cutting down rain forests, it is important to keep in mind air quality. When too many trees are cut down in a given area, there may be decrease in the air's (A) quality (B) carbon dioxide (C) helium amounts (D) carbin dioyide levels

Ex Output:
A


Ex Input:
Asking a blind person to look at something is rude because they are (A) unable to speak (B) unable to eat (C) unable to see (D) unable to live

Ex Output:
C


Ex Input:
If a person recycles a wooden stool, they could buy that same material again as a (A) plastic cup (B) metal rod (C) gold trophy (D) yellow pencil

Ex Output:

D