From a firms short run production function, the marginal product of labor and the average product of labor may be determined. The marginal product of labor is the:
A. total output divided by the number of workers employed
B. change in total revenue attributed to the increased output from employing an additional worker
C. change in total cost attributed to the increased output from employing an additional worker
D. change in total output attributed to employing an additional worker
E. change in total output attributed to producing an extra unit of a good