Definition: 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").
Input: A herd of deer may be forced to search for a new home if (A) resources in an area become too few to maintain the herd (B) water in an area becomes slightly briny (C) more babies are born in the spring (D) moose move into an area that deer are in
Output:
A