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: If a person is lost in an arid space with little rainfall, they can live longer if they (A) use water barely (B) use water freely (C) use water liberally (D) use water gratefully
Example Output: A

Example Input: With more people eating cereal there comes a need for more (A) butter (B) top soil (C) water (D) corn
Example Output: D

Example Input: the earth's population could face severe depletion if which of these stopped happening? (A) the running man dance (B) the American Idol show (C) human gene cloning research (D) the food pyramid structure
Example Output:
D