Four beads each of mass `m` are glued at the top, bottom and the ends of the horizontal diameter of a ring of mass`m`. If the ring rolls without sliding with the velocity `v` of its, the kinetic energy of the system (beads+ring) is
A. `5 mv^(2)`
B. `4 mv^(2)`
C. `2mv^(2)`
D. `mv^(2)`