Which of the Following Represents the Ring Topology

Which of the following represents the ring topology?

A) All devices are connected to a central cable or backbone.
B) All devices are connected to a central device,called a huB.
C) All devices are connected to one another in the shape of a closed loop,so that each device is connected directly to two other devices,one on either side of it.
D) Groups of star-configured workstations are connected to a linear bus backbone cable.