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: The circulatory system brings oxygen to the body from where? (A) The chest (B) The brain (C) The feet (D) The stomach

Output: A


Input: Consider Input: What displays the movement of electrons from the base atoms? (A) venus (B) mercury (C) plasma star (D) pluto

Output: C


Input: Consider Input: Which only needs sparse water? (A) fish (B) frogs (C) whales (D) chuckwallas


Output: D