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: A ship navigates with a magnetic compass because it is (A) predictable (B) unpredictable (C) waterproof (D) tradition
Example Output: A

Example Input: In a decade spring occurs (A) three times (B) twelve times (C) ten times (D) twice
Example Output: C

Example Input: An example of playing a musical instrument is what? (A) driving (B) flying (C) walking (D) banging drums
Example Output:
D