A wheel of radius 20 cm is pushed ot move it on a rough horizontal surface. It is found to move through a distance of 60 cm on the road during the time it completes one revolutionabout the centre. Assume that the linear and the angular accelerations are uniform. The frictional force acting on the wheel by the surface is
A. Along the velocityofthe wheel
B. Oppositetothe velocityofthe wheel
C. Perpendicularto thevelocityofthe wheel
D. Zero