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 doesn't contain water? (A) Sea of Tranquilitiy (B) Caspian Sea (C) Dead Sea (D) Caribbean Sea

Output: A


Input: Consider Input: If a tree is going to give its essence to another tree, it needs to use (A) small creatures (B) great stamina (C) positive attitude (D) mighty strength


Output: A