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: Amphibians undergo changes in structure of being in that (A) salamanders can regrow their tails (B) salamanders can lose their tails (C) frogs can breathe air and water (D) they begin as a different looking being
Example Output: D

Example Input: Greenhouses are great for plants like (A) Pizza (B) Lollipops (C) Candles (D) French beans
Example Output: D

Example Input: An example of hunting is an otter cracking open clams with a rock, another is (A) an eagle preening its feathers (B) a fish swimming back upstream (C) a bear swiping at a hive (D) a deer eating grass
Example Output:
C