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 event includes melting? (A) making ice (B) cooking in butter (C) cutting carrots (D) buttering bread
Example Output: B

Example Input: Which likely most relies on its looks to reproduce? (A) the shark (B) the horse (C) the spider (D) the peacock
Example Output: D

Example Input: Fossils are formed when what happens? (A) layers of leaves and pebbles form a pile (B) layers of sand are washed up on a beach (C) dirt builds up in the outdoors (D) various types of dirt accumulate over something eventually
Example Output:
D