A Ball Collides with a Second Ball at Rest

Multiple Choice

A ball collides with a second ball at rest. As a result of the collision, the first ball comes to rest and the second ball moves off at the speed of the first ball. In this collision

A) not enough information to say whether masses are equal or total kinetic energy is conserved.
B) the masses are unequal and total kinetic energy is not conserved.
C) the masses are unequal and total kinetic energy is conserved.
D) the masses are equal and total kinetic energy is not conserved.
E) the masses are equal and total kinetic energy is conserved.