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 does light from the sun arrive at in final time length? (A) Uranus (B) Mars (C) Pluto (D) Earth
Example Output: C

Example Input: A large mill in the area has led to streams and rivers being filled with (A) rapids (B) boats (C) fish (D) pollutants
Example Output:
D