Russell Crowe's economic rent from starring in a movie is equal to the difference between

A、hisinitialofferandhisfinalsalary,includingroyalties.;
B、hisinitialofferandthewhathecouldearninadifferentfilm.;
C、hisfinalsalaryandtheaverageforleadingactors.;
D、hisfinalsalaryandtheleasthewouldbewillingtoacceptforarole.