Six steel balls of identical size are lined up along a straight frictionless groove. Two similar balls moving with speed `v` along the groove collide with this row on the extreme left end. Then

Options

A. one marble from the right rolls out with s peed 2v, the remaining marbles do not move
B. two marbles from the right roll out with a spweed v each, the remaining marbles do not move
C. all six marbles in the row will roll out with a speed v/6 each, the two incident marbles will come to rest
D. all eight marbles will start moving to the right, each with a speed of v/8