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: A glacier moved through an area years and years ago, and scientists can tell this by (A) looking at the moon (B) looking at the dogs (C) looking at the sky conditions (D) glancing at nearby stone
Example Output: D

Example Input: Which of the following would occur in nature? (A) an osprey catches a fish with claws (B) a fish catches a fish with its claws (C) a dog catches a fish with its claws (D) a worm catches a fish with its claws
Example Output: A

Example Input: The volume of water in a pond could increase if (A) the water drains out of the pond (B) a large flock of ducks visits the pond (C) people swim in the pond (D) there is stormy weather
Example Output:
D