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

A lady uses a shisha pipe while sitting. The lady blows the smoke into a cut, soapy bottle half. The bubble pops releasing the smoke. the bubble

I. float away with the smoke still enclosed and falls to the floor.
II. pops catching in the stream and the lady ok the smoke before inhaling it.
III. pops and the lady inhales, then exhales smoke.
IV. pops free and we see a beautiful lake.
The answer is:
I.