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: Within a twenty four hour period, a person could experience (A) a globe's complete rotation (B) thirty hours of night (C) a day on Pluto (D) a year of schooling
Example Output: A

Example Input: Which is most accurate? (A) dams can capture powerful gusts and harness their power (B) windmills can capture lightning bolts and harness their power (C) dams can capture lightning bolts and harness their power (D) windmills can capture powerful gusts and harness their power
Example Output: D

Example Input: The changing of night to day occur (A) three times a day (B) seven times a week (C) six times a week (D) twenty-nine times a month
Example Output:
B