When a Cannon Fires a Cannonball, the Cannon Will Recoil

Multiple Choice

When a cannon fires a cannonball, the cannon will recoil backward because the

A) energy of the cannonball and cannon is conserved.
B) momentum of the cannon is greater than the energy of the cannonball.
C) energy of the cannon is greater than the energy of the cannonball.
D) momentum of the cannon is conserved.
E) momentum of the cannonball and cannon is conserved.