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: 2000 years ago, this method would likely have brought sand from the coast to the desert (A) the pyramids often eroded, making their own sand (B) constant breezes over time (C) human automobiles transfer materials (D) the space shuttle moved sand great distances
Example Output: B

Example Input: You can use what to fake sunlight for plants? (A) love (B) a flash light (C) breathing (D) water
Example Output: B

Example Input: Just below the Earth's crust is something that sounds like it should be over a (A) window (B) house (C) door (D) fireplace
Example Output:
D