(Table: Value of the Marginal Product of Labor and Demand)

Multiple Choice

(Table: Value of the Marginal Product of Labor and Demand) In the figure Value of the Marginal Product of Labor and Demand, the total product of labor is shown for the hourly production of power cords.If the price of a power cord is $2, the value of the marginal product for the fifth worker is:

A) $0.
B) $20.
C) $40.
D) $60.