Multi-select problem: How does the next paragraph end?

How to do a scissors twist with an exercise ball
Put your exercise ball in an open space.
Make sure there's nothing nearby that could distract or hurt you as you exercise.
Lie down on your back with one of your legs on top of the ball and the other right next to it on the ground.

OPT: A). Put your right arm over your head, or do an oval figure 8. Put some more exercise ball in the yard. B). Your leg should be slightly bent to give you a more stable grip that allows you to grab on to the ball and hold it steady while you do the exercise. Place your hips hip-width apart to start a straight twist. C). Prop yourself up slightly on your elbows so that you're looking at the ball, with your hands pressed palm-down to the ground. Squeeze the ball between your lower legs/ankles and lift it up from the ground. D). Bend your left knee to reach your partner's left knee. With your left leg on top of the ball, bend your left knee so that the flat part of your foot is touching your partner's knee.
C).