Car A rear ends Car B, which has twice the mass of A, on an icy road at a speed low enough so that the collision is essentially elastic. Car B is stopped at a light when it is struck. Car A has mass mand speed vbefore the collision. After the collision

a.     each car has half the momentum.

b.     car A stops and car B has momentum mv.

c.     car A stops and car B has momentum 2mv.

d.     the momentum of car B is four times as great in magnitude as that of car A.

e.     each car has half of the kinetic energy.