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: The usual kind of weather in a location is called what? (A) warmth (B) fog (C) zone conditions (D) visibility
Example Output: C

Example Input: In order for a crane to operate properly it requires (A) sand (B) the wind (C) solar power (D) a fulcrum
Example Output:
D