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: An example of an instinctive behavior is (A) doing a cartwheel outside (B) singing on a stage (C) eating a large pizza (D) a mother feeding the kids
Example Output: D

Example Input: What is the best example of a live birth? (A) a fish laying a clutch (B) a platypus warming an egg with its furry body until a baby is born (C) a bird warming the eggs in her nest until they hatch (D) a koala delivering into her pouch
Example Output: D

Example Input: Lions eat animals (A) in a different environment from where they live (B) in the water (C) underground (D) in the same environment where they live
Example Output:
D