Paul is pushing the wheelbarrow in his garden to the east. His friend John comes along and starts pushing it in the opposite direction, to the west, with a force that's twice as great as Paul's. What can you say about the motion of the wheelbarrow?
A. It will move faster than before, to the east.
B. It will move in the direction of johns push, to the west.
C. It will move with the same speed and in the same direction as before, to the east.
D. It will stop moving immediately.