Can Two Pool Balls, Both of Them Moving, Have a Total

Multiple Choice

Can two pool balls, both of them moving, have a total momentum of zero?

A) No, because any moving object has momentum.
B) No, because they both have energy.
C) Yes, if they are moving in opposite directions, both with the same speed.
D) Yes, if they are both moving outward from the same point.
E) Yes, but only at the instant that they collide.