Instructions: 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: Trees grow growth-rings one time each year; so which of these is correct? (A) a tree with nine rings is nine years old (B) a tree with six rings is seven years old (C) a tree with eight rings is five years old (D) telling how old a tree is is impossible based on rings
Output:
A