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: Sunlight is a source of (A) wind energy (B) warmth (C) frigid temperatures (D) moonlight
Example Output: B

Example Input: if a person wanted to hunt down some deer, which of these would be the wrong place to visit? (A) the local hunting reservation (B) a known national reservation (C) an uncharted wilderness region (D) a natural unregulated forest
Example Output: B

Example Input: As dry soil becomes more and more broken up, it will always contain more (A) water (B) calcium (C) oxygen (D) rocks
Example Output:
C