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

An introduction comes onto the screen for a demonstration of a mop. The mop is shown being used in a figure eight motion to clean the floor. the mop

Select from: (a). is now on one side of the floor where it can be seen while the person pushes it along.. (b). is wrung out and used to do a second pass on the floor.. (c). gets turned as the motion changes continuously.. (d). is being washed with pressure..
The answer is:
(b).