Two masses are being pulled up a 30.0-degree incline by a force F parallel to the incline. The acceleration down the incline is 1.00 m/s2 and the velocity is down the incline. The force is applied to a 200-kg mass and a string connects the 200-kg mass to a 150-kg mass. The coefficient of kinetic friction is 0.200. The force F is
A. 771 N.
B.875 N.
C. 1,050 N.
D. 1,960 N.
E. 2,330 N.