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: if the surface of our planet is different after a while, what could have happened? (A) the surface eroded on its own (B) all of these (C) there were natural occurrences (D) man has damaged the surface
Example Output: B

Example Input: A lizard that passed away centuries ago may be viewed most easily today in some ways through (A) globes (B) mirrors (C) telescopes (D) sediment
Example Output: D

Example Input: Sea nomads' larger spleens let them (A) eat every kind of poison on the planet (B) hold their breath for longer underwater (C) post low quality content on the internet (D) time travel to the future
Example Output:
B