When V>R\omega then the bottommost point will have a tendancy to move forward. Thus, the friction will act backwards. Thus the translational acceleration will decrease, and angular acceleration will increase, as the sense of torque will be same because of the opposition due to the Friction.
When V<R\omega then the bottommost point will have a tendancy to move backwards. Thus the Friction will act forward. Thus, the translational velocity will be increased by the friction and so will be the translational acceleration. This will decrease the angular acceleration.
Thus r should be q for B and r for C.