which of the following statements is true? a if the quantity of labor is increased, holding everything else constant, the marginal product of labor will fall. b if the quantity of labor is increased, holding everything else constant, the value of the marginal product of labor will rise. c if the wage is increased, holding everything else constant, the marginal product of labor will decrease. d if the price of labor is increased, holding everything else constant, the demand for labor will increase. e if the quantity of labor is increased, holding everything else constant, the marginal product of labor will rise.
