A sphere of mass M and radius r slips on a rough horizontal plane. At some instant it has translational velocity `V_(0)` and rotational velocity about the centre `(V_(0))/(2r)`. The translational velocity when the sphere starts pure rolling motion is
A. `(V_(0))/(5)`
B. `(V_(0))/(7)`
C. `(V_(0))/(3)`
D. `(6V_(0))/(7)`