Which of the following is an example of moving properly for calf raises?

A. Raising the heels, leaning slightly forward with knees and hips flexed

B. Lowering the heels, leaning slightly forward with feet approximately should width apart

C. Raising and lowering the heels, leaning slightly backward with feet approximately shoulder width apart

D. Raising and lowering the heels, leaning slightly forward with feet approximately shoulder width apart