What is "producer surplus"? Select a Choice Below current question choices OptionA Producer surplus is defined as the area below the supply curve and above the market price line. OptionB Producer surplus is the sum of the quantities of output produced and the quantities of output sold in the market. OptionC Producer surplus is the difference between the quantities of output produced and the quantities of output sold in the market. OptionD Producer surplus is the difference between the firm's revenue from selling the equilibrium quantity and its total cost of production