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

The documentary shows the mopping process with a mop and bucket. A clip of images of research and development department and laboratory and quality control departments. a mop

Options: [i] mop and bucket is shown being handed down and is then used to clean a carpet in a kitchen. [ii] is pushed against a rail. [iii] being dipped into a yellow bucket and the ringing of the mop and the mop sliding across the floor with more dipping the mop and ringing the mop. [iv] is melted down and removed, cleaned, graveled, fabric is wrapped, and replaced.
[iii]