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:
Which of the following is never an element used to make carbohydrates for the plant? (A) sand (B) water (C) sunlight (D) carbon dioxide

Ex Output:
A


Ex Input:
Factories often add something to the environment that is (A) helpful (B) productive (C) sanitizing (D) posionous

Ex Output:
D


Ex Input:
As far as plants go, considering their growth, it is unlikely that they would do well in (A) a large patio setting (B) a humid, open greenhouse (C) a damp patch of earth (D) a basement without windows

Ex Output:

D