Multi-choice problem: Continue writing the next sentence in this paragraph:

A person mops the floor while a dog chase the mop. the person

Options are:
(I) spins around the mop and the dog also spins.;
(II) vacuums the floor and ends the video by turning off the camera.;
(III) walks into the living room and sits down on the floor.;
(IV) rooms a woman with a video camera.;
(I)