Use the Following to Answer Questions

Multiple Choice

Use the following to answer questions:
-(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. Assume that the market for power cords is perfectly competitive. 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.