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

A man on the screen begins to describe a mop and bucket set that are used for cleaning floors. he

Possible answers:
A). then begins to demonstrate how to use the mop and bucket set.;
B). sweeps the floors once more and returns back to speaking about how to clean them correctly.;
C). explains the yellow paint job he will be using on the floor.;
D). shows how the mopping flows into the sink and into a bucket.;
A).