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: in order for a person's burger to make it successfully into the toilet, which of these must be functional? (A) the respiratory system (B) the digestive system (C) the circulatory system (D) the destructive system

Output: B


Input: Consider Input: Which would create the most pollution (A) animals (B) rivers (C) smoke stacks (D) toxicity

Output: C


Input: Consider Input: If a thing is going to be able to expand, it will require (A) nutriment (B) pipes (C) flounder (D) conversation


Output: A