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: What needs measurements taken in the morning and evening? (A) coastal range (B) tidal range (C) wave length (D) apex
Example Output: B

Example Input: Which likely increased atmospheric CO2 recently? (A) sustainable fisheries (B) electric cars (C) motorcycles (D) ant populations
Example Output: C

Example Input: Which would likely most impact a barometer? (A) gale-force winds (B) thunder (C) light breezes (D) lightning
Example Output:
A