A Man Pushes Against a Rigid,immovable Wall

Multiple Choice

A man pushes against a rigid,immovable wall.Which of the following is the most accurate statement concerning this situation?

A) The man can never exert a force on the wall that exceeds his weight.
B) If the man pushes on the wall with a force of 200 N,we can be sure that the wall is pushing back with a force of exactly 200 N on him.
C) Since the wall cannot move,it cannot exert any force on the man.
D) The man cannot be in equilibrium since he is exerting a net force on the wall.
E) The friction force on the man's feet is directed to the left.