If the Additional Revenue from Hiring an Additional Worker Equals $\mathrm { MRP } _ { L }$

If the additional revenue from hiring an additional worker equals the additional costs from hiring the extra worker,then we know that

A) MFC = $\mathrm { MRP } _ { L }$ .
B) MFC/ $\mathrm { MRP } _ { L }$ = wage.
C) MFC/ $\mathrm { MRP } _ { L }$ = 1.
D) $\mathrm { MRP } _ { L }$ /P = MFC.