Which of the following statements regarding economic rents is correct?

Select one:

a.

All economic rents are bad and should be eliminated

b.

There is no rent earned when a market is in a competitive equilibrium in the short-run

c.

The existence of disequilibrium rents is the reason that competitive markets always return to an equilibrium position

d.

In a labour market with a minimum wage above the market clearing level, the economic rent earned by employed workers is a stationary rent