Marlon Intends to Sell a Piece of Real Estate He

Marlon intends to sell a piece of real estate he owns and contracts Nita,a real estate broker,to make the sale.In the contract,Marlon authorizes Nita to make the sale at or above a minimum price he wants and the date by which he wants the sale to be completed.The contract also stipulates that Marlon must not hire another broker to sell that piece of land until the expiration of the contract period.Nita finds a suitable buyer,makes the sale in time,and Marlon pays for her services.Which of the following types of agencies had Marlon and Nita entered into?

A) apparent agency
B) agency by ratification
C) implied agency
D) express agency