A) If car 1 sticks to car 2, the final total kinetic energy of the car1-car2 system is less than the initial total kinetic energy of the two cars. B) If car 1 sticks to car 2, the car1-car2 system must be at rest after the collision. C) Suppose (for this statement only) that car 2 was NOT initially at rest, but was instead heading towards car 1 with equal (but opposite) momentum before the collision. After the collision, the cars must both be at rest. D) If car 1 is much lighter than m2, and the collision is perfectly elastic, car 1 will continue heading to the right with nearly its original speed after the collision. E) If the collision is elastic, car 1 must always come to a stop after the collision Anyone have ideas on these?