Angle of dwell of cam is defined as the angle________________?

A. during which the follower returns to its initial position
B. of rotation of the cam for definite dis¬placement of the follower
C. through which the cam rotates during the period in which the follower remains in the highest position
D. moved by the cam from the instant the follower begins to rise, till it reaches its highest position
E. moved by the cam from a beginning of ascent to the termination of descent