A Firm That Is a Monopsonist in the Labor Market $\mathrm { MRP } _ { \mathrm { m } }$

A firm that is a monopsonist in the labor market and a monopolist in the product market will hire labor to the point at which

A) MFC = $\mathrm { MRP } _ { \mathrm { m } }$ .
B) a perfectly elastic labor supply = MRP.
C) a perfectly inelastic labor supply = perfectly inelastic labor demand.
D) where supply of labor = demand for labor.