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

A person then comes and removes the chain from the bike and places it on the ground. The man then takes out a yardstick and begins to measure certain parts of the bike. pieces

pick from the following. 1). are then removed and tightened with the wrench and rings are placed inside by where the chain goes.. 2). of the chain are then drawn over the handlebars.. 3). of metal then decorate the frame and he hangs them up.. 4). are then shown and the brakes are adjusted to minimize rough materials and dirt..
The answer is:
1).