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:
A plane travels through what? (A) gas layers (B) plains (C) oceans (D) time

Ex Output:
A

Ex Input:
When the sun rises, there is light and it is daytime. When is it night time? (A) when its blue and Pink (B) when its down and lightless (C) when its seven and eight. (D) when its dead and gone

Ex Output:
B