Assume that barber shops operate in perfectly competitive product and factor markets. Which of the following will happen to working barbers if the price of haircuts decreases?

(A) The marginal Product of the last barber hired Will not Change.

(B) The marginal product of the last barber hired will decrease.

(C ) The marginal revenue product curve will shift to the right.

( D ) The marginal revenue product curve will shift to the left.

(E) There will be a movement upward along the marginal revenue curve.