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 event can lead to the human caused change of an environment? (A) seasonal storms (B) annual flooding (C) natural woodland fires (D) clear cutting

Ex Output:
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:
A thing which is measured, such as a bucket of salt, needs to first be (A) evaded (B) burned (C) gathered (D) lost

Ex Output:

C