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: The earth makes its way around the sun. Because of the constant rotation, the appearance of these is unlikely to be regular. (A) the moon (B) the oceans (C) celestial bodies (D) the sun
Example Output: C

Example Input: Camouflage is used by entities for hunting (A) air (B) trees (C) vittles (D) water
Example Output: C

Example Input: A stopwatch is helpful (A) when ascertaining what time it is (B) when tracking split times on runs (C) when setting an alarm clock (D) when ascertaining answers on a times table test
Example Output:
B