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: migration is when animals travel from the northern most state to Texas during what segment of time? (A) lake fronts (B) birds (C) winter (D) spring
Example Output: C

Example Input: When the old man was much younger, he still had (A) brown eyes (B) baldness (C) gray hair (D) wrinkled skin
Example Output: A

Example Input: Which is an example of sound reaching the ear? (A) a cello (B) taste testing (C) a silent movie (D) a comic book
Example Output:
A