A box is being pushed to the left across a flat and rough surface. Which is a correct description of the forces acting on the box?

A.
The only force acting on the box is the pushing force.
B.
A force is pushing the box to the left, and the force of friction is also pushing the box to the left.
C.
The only force acting on the box is the force of friction.
D.
A force is pushing the box to the left, and the force of friction is pushing the box to the right.