What happens next in this paragraph?

The people get slightly stuck, then unstuck as they go down small waterfalls. A woman falls out, and is pulled back in by another person. we
pick from the following. [I] see the lake bank.. [II] see a man doing environmentalist demonstrations on water.. [III] then see several images of people in kayaks on the rapids.. [IV] see people were ll down a different small waterfall..
[III]