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: Webbed feet aid in what (A) penguins laying eggs on ice (B) fish hiding in coral reefs (C) gulls dive bombing fish from the sea (D) ducks chasing prey underwater
Example Output: D

Example Input: If you want to bottle your own pop, you should invest in (A) Andy Warhol paintings (B) an aluminum mine (C) blonde dye bottles (D) a telescope
Example Output: B

Example Input: You can get Vitamin D from (A) vegetable oil (B) greek yogurt (C) gumdrops (D) bottled water
Example Output:
B