A.The angle between the normal reaction and the resultant of normal reaction and the limiting friction
B.The tangent of the angle between the normal reaction and the resultant of the normal reaction and the limiting friction
C.The tangent of the angle of the net resultant force with the direction of motion
D.The tangent of the angle between the normal reaction and direction of limiting friction
E.The tangent of the angle between the horizontal plane and the resultant force