Sheepherders in New England Grazed Their Animals on Their Own

Sheepherders in New England grazed their animals on their own pastures in a conservative fashion,so that the grass could regrow and the grazing continue indefinitely.However,they overgrazed the common pastures,which resulted in the destruction of these areas.This problem became known as the

A) social action dilemma.
B) invisible hand problem.
C) public goods dilemma.
D) tragedy of the commons.