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

He then shows how to do stomach crunches by holding the back of head with his hands and moving his body back and forth and sideways while folding his knees to his chest. he

Select from the following.
(I). then shows how to do shower soap by using water and the disposable paperclip to wipe the nose and make a face.;
(II). then demonstrates and then exercises by sticking up his lower abdomen and holding his head down and facing away from the cameras.;
(III). then videos more text on how to do the side crunches.;
(IV). continues doing crunches and then stops.;
(IV).