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

A person sitting next to a bike demonstrates how to remove and replace a bike chain using a small tool. the video

pick from the following. 1. ends with the closing graphics and credits shown on the screen.. 2. cut to clips of several bikers at a competition which include several injured and schools only a few blocks away and several bikes at their construction sites.. 3. shows a closeup of the machine as well as the tools tiny tack on the back of the bike, as well as some cameras on front it.. 4. shows several clips of actions they took on the bike to install in the seat of a bike..
The answer is:
1.