Which of the following is the best example of economic rent?
A)Bob leases a two-bedroom apartment in town for $1,000 that he could have got for $700.
B)Ann was paid a $20,000 bonus this year for selling $500,000 more than her required sales quota.
C)Diane received a $20,000 raise to counter a job offer she received from a competing firm.
D)Carl,a union member,earns $20,000 more than a worker who is not a member of the union.