If We Have Information About Workers' Marginal Products, Then Total

If we have information about workers' marginal products, then total and average product can be found by

A) dividing marginal costs by the number of workers.
B) multiplying the average marginal product times the number of workers.
C) summing the marginal values to find the total and multiplying it times the number of workers to get the average.
D) summing the marginal values to find the total and dividing it by the number of workers to get the average.