When Hiring Labor,to Maximize Profit a Firm Hires Labor

Multiple Choice

When hiring labor,to maximize profit a firm hires labor

A) until the value of marginal product equals the wage rate.
B) if the workers are not unionized.
C) until the value of marginal product is less than the wage rate.
D) until the value of marginal product is greater than the wage rate.
E) until the value of marginal product equals the marginal revenue from hiring the worker.