George is trying to move a heavy bookshelf across the classroom. He pushes on the bookshelf with a force of 57N to the right. Friction is resisting his movement with a force of 78N. The bookshelf does not move. A friend comes to help George. The friend pushes the bookshelf in the same direction as George with a force of 25N. What will happen to the bookshelf?

A: The bookshelf will move to the right with a force of 82 N
B: The bookshelf will move to the left with a force of 25 N
C: The bookshelf will not move.
D: The bookshelf will move to the right with a force of 4 N.