This is a test of commonsense with single/multi-choices. Complete the next sentence:

How to grow hips with exercise
Try the side-lying hip abduction.
Lay on your side on a mat, with your knees bent slightly and 1 leg stacked evenly on top of the other. Your hips should be at a 90 degree angle to the ground, not angled towards the front or the back.

OPT: a). Bend your lower leg a little more to give yourself balance and support, and straighten your top leg with your foot flexed. Raise your top leg upward (while keeping your foot flexed) and slightly backwards, then lower it again. b). Your big toe, the one that is pointing away from the mat, should be hanging off to the side. Pick up your arm to expose your lower leg. c). As you lie on your back on your mat, take large breaths in and out. This should push excess blood from your lower abdomen towards your back. d). It will be easier to move your hips in this position, and will give you more power as you move your arms and legs. Once you've been in position for about 30 seconds and done thigh raises, your arms and legs will get tired and you'll lose more muscle control over your body.
The answer is:
a).