The Function $D(p)=1200-200 p$ Gives the Weekly Demand for DVD Rentals at Joe's Videolog

Multiple Choice

The function $D(p) =1200-200 p$ gives the weekly demand for DVD rentals at Joe's Videolog when Joe charges $\$ p$ to rent a DVD. What does $D^{-1}(60)$ mean in practical terms?

A) The number of rentals demanded if Joe charges $\$ 60$ per rental.
B) The rental fee Joe must charge to get a weekly demand of 60 rentals.
C) The profit Joe makes if he charges $\$ 60$ per rental.
D) The rental fee Joe must charge to get a profit of $\$ 60$ .