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").

Example Input: wind is used for producing (A) cupcakes (B) smores (C) excited particle flowing (D) plants
Example Output: C

Example Input: Jeff noticed that the big dipper was in a different spot in the sky at 2am than where it was at 10pm. Why? (A) because of the earth's orbit (B) the stars had rotated (C) Jeff had been instantly transported thousands of miles from where he'd been at 10pm. (D) the earth had turned
Example Output: D

Example Input: A plant can germinate in another place when a person rubs against its (A) flowers (B) roots (C) leaves (D) stems
Example Output:
A