There Are 15 Billiard Balls in a Rack

Multiple Choice

There are 15 billiard balls in a rack. The rack is removed. The balls are in triangular formation with the tip toward the cue ball. The cue ball is shot into the ball on the tip of the triangle. Assuming all balls have the same mass, in which direction does the net velocity vector of the set of balls point soon after the cue ball strikes them?

A) opposite to the cue ball's velocity before collision
B) same direction as the cue ball's velocity before collision
C) net velocity vector of the balls in the rack is zero
D) not enough information