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: Which is competition? (A) a giraffe eats the highest leaves (B) a bear takes a salmon from the stream (C) a shark eats a tuna that an orca was hunting (D) a slug eats a blade of grass
Example Output: C

Example Input: When the amount of food goes down, the amount of conflict between the organisms searching for it will (A) nothing. (B) remain the same (C) go down (D) go up
Example Output: D

Example Input: in which of these environments would one ideally situate a farm? (A) in the middle of the desert (B) none of these (C) in the rocky mountains (D) over on the grassland
Example Output:
D