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: 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: What is undesirable in a vegetable garden? (A) tomatoes (B) green peppers (C) corn (D) dandelions
Example Output: D

Example Input: If a species of plant or animal ceases to exist on earth, either by natural causes or by activities of humans, the loss of the plant or animal (A) reversible extinction (B) cannot be undone (C) reversible (D) a subspecies
Example Output:
B