The Marginal Product of Labor Is Expressed in _______, While

The marginal product of labor is expressed in _______, while the marginal revenue product of labor is expressed in __________.

A) units of output per unit of labor; dollars per unit of labor
B) units of output per unit of labor; units of output per unit of labor also
C) dollars per unit of labor; units of output per unit of labor
D) dollars per unit of labor; dollars per unit of labor also