The Demand for Labor Depends Primarily on the Additional Output

The demand for labor depends primarily on the additional output produced as a result of hiring an additional worker and

A) the additional revenue received from selling the output produced as a result of hiring an additional worker.
B) the payment made to the worker for producing the additional output.
C) the elasticity of demand for the output produced by the worker.
D) the number of workers willing to produce the additional output.