A small solid block is released from rest at the top of a smooth, straight ramp. It slides down the ramp and immediately transitions onto a rough horizontal runway, where it eventually comes to rest.

Assume that the transition between the ramp and the runway is smooth enough that the block does not bounce or lose speed instantly during the transition, and ignore air resistance.

Which velocity-time graph represents the motion of the block from the moment of release until it comes to rest?