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").

Input: Consider Input: Which of the following has a population of zero? (A) Merriam's elk (B) bison (C) llama (D) whooping crane

Output: A


Input: Consider Input: A stone may experience the most weathering over (A) a week (B) a year (C) a century (D) a decade

Output: C


Input: Consider Input: I left a statue outside  away from water for 100 years, when I come back it is significantly smaller, why? (A) The Wind (B) Birds (C) Tiny Trolls (D) Ants


Output: A