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:
An example of replacing a natural resource like copper might be (A) recovering ores (B) running around (C) throwing up (D) using plastic straws

Ex Output:
A


Ex Input:
When the availability of food sources increase in an environment, what will also increase? (A) Trash (B) Bodies of Water (C) Animals/Plants (D) Air

Ex Output:

C