The Question of How Much Labor a Firm Will Hire

The question of how much labor a firm will hire comes down to:

A) whether added workers are going to generate more revenue or not.
B) if the added workers are going to add profits to the firm.
C) whether the value of the marginal product is greater than, less than, or equal to the average total cost.
D) the amount of capital that will be required in order to ensure the worker is productive.