The Tragedy of the Commons Illustrates How

The tragedy of the commons illustrates how:

A) a non-zero-sum game can degenerate into a zero-sum game
B) individual irrationality results in group rationality
C) superordinate goals may fail to produce cooperation in capitalistic societies
D) individuals can benefit from a group without contributing to it
E) the pursuit of short-term individual gain leads to long-term collective costs