What happens next in this paragraph?

A man in a white lab coat is seen talking to the camera and showing various tools in a laboratory. towel
Options are: i. cleaning is shown by hand and a man works on an inner tube with various tools laid out for him.; ii. are seen sitting in a sink and the man shows the proper hand washing tools.; iii. cleans and with a violin played makes measurements of the instrument making instructions.; iv. scraping is seen on the floor in front of him as he continues to speak.;
ii.