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:
An early example of harnessing wind power would be (A) unicorns (B) santas flying reindeer (C) trumps windy speeches (D) cloth on masts

Ex Output:
D


Ex Input:
Why animal may use a rock as shelter (A) Centipede (B) Dolphin (C) Seagull (D) Dog

Ex Output:
A


Ex Input:
When soil is disrupted to extreme levels (A) plants thrive (B) environments suffer (C) mice breed (D) bugs hoard

Ex Output:

B