A Person Is Pushing on a Box Exerting a Force

Multiple Choice

A person is pushing on a box exerting a force of magnitude P, as shown in the figure.Earth exerts a force W on the box.The push is directed at an angle θ below the horizontal,and the box remains a rest.The box rests on a horizontal surface that has some friction with the box.The force that the surface exerts on the box perpendicular to the surface is equal to

A) W.
B) W + P.
C) W + P cos θ.
D) W + P sin θ.
E) W - P sin θ.