To Determine the Marginal Physical Product of Labor, You Must

To determine the marginal physical product of labor, you must

A) hold total output constant and calculate how much revenue an additional worker generates
B) hold capital constant and calculate how much revenue an additional worker generates hold capital constant
C) hold all other factors of production constant and calculate how much output an additional worker produces
D) hold labor constant and calculate how much output an additional worker produces
E) hold labor constant and calculate how much revenue an additional worker generates