Answer: The correct answer is -
C) Unregulated hunting could lead to species becoming endangered.
If hunting (capturing or killing of wild animals and birds) is done and not regulated in a particular area (that is overpopulated with deer), it can decline their number thus making the deer species endangered. This means that decline to the extent that the species experience a danger of becoming extinct/eliminated completely.
Thus, it needs to be regulated in the area that is severely overpopulated with deer.
Therefore, option C) is the right answer.