Which of the following quotations illustrates the Tragedy of the Commons?

A) A bird in the hand is worth two in the bush.

B) You can't always get what you want.

C) Anyone who is not a socialist before he is 30 has no heart; anyone who is still a socialist after he is 30 has no head.

D) What is common to many is taken least care of, for all men have greater regard for what is their own than for what they possess in common with others.

E) The only difference between the rich and other people is that the rich have more money.