Read the excerpt from The Common Sense of Bicycling: Bicycling for Ladies. By straightening the knees and using the ankle movement freely, the rise of the knees may be lessened several inches. When the pedal is at the highest point, the toe should be raised and the heel lowered. . . . although the right pedal is at the highest point, the knee has made very little impression on the front skirt. The feet should be in line with the machine, turning neither in nor out. The knees must be kept pretty close to the machine and should not move laterally at any part of the circle. The arms should have a slight drop at the elbows. The handles should be about level with the saddle, but this will depend on relative length of arms and waist.

According to the excerpt, which should be included in a list of the procedures for riding a bicycle? Check all that apply.

aligning the head
aligning the feet
lowering the heels
moving the ankles freely
bending and straightening the knees
straightening the spine and back
adjusting the arms and elbows