Use the Following to Answer Question

Multiple Choice

Use the following to answer question:
-(Table: Value of the Marginal Product of Labor and Demand) Use Table: Value of the Marginal Product of Labor and Demand.In the table,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.