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 trees to use sunlight they must (A) their roots (B) the light switch (C) CPR (D) respire

Output: D


Input: Consider Input: A ship navigates with a magnetic compass because it is (A) predictable (B) unpredictable (C) waterproof (D) tradition

Output: A


Input: Consider Input: what does a barometer do to air pressure (A) state its tightness (B) store it (C) disperse it (D) condense it further


Output: A