A man of mass m stands on a frame of mass M. He pulls on a light rope, which passes over a pulley. The other end of the rope is attached to the frame. For the system to be in equilibrium, what force must the man exert on the rope?
A. `(1)/(2)(M+m)g`
B. `(M+m)g`
C. `(M-m)g`
D. `(M+2m)g`
