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").

Ex Input:
In order for trees to use sunlight they must (A) their roots (B) the light switch (C) CPR (D) respire

Ex Output:
D


Ex Input:
Which are in opposition for similar chow? (A) cats and mice (B) dogs and sycamores (C) bears and salmon (D) lions and hyenas

Ex Output:
D


Ex Input:
A ruler is used for measuring the length of what? (A) distance between cities (B) air (C) stuff (D) motivation

Ex Output:

C