You will be given a definition of a task first, then some input of the task.
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").

If a habitat that supports itself is flourishing, improvements may still be made by (A) burying small oak pips (B) using pesticides fairly regularly (C) setting uncontrolled wild fires (D) setting out mouse traps
Output:
A