A Force Pushes a Block Along a Horizontal Surface Against

A force pushes a block along a horizontal surface against a force of friction . If the block undergoes a displacement at constant velocity, the work done by the resultant force on the block

A) is equal to the work done by the force of friction .
B) is given by .
C) increases the kinetic energy of the block.
D) increases the potential energy of the block.
E) is zero.