What happens next in this paragraph?

How to build and tune a wind chime
Gather chime material.
The sound the chimes will make depends on many factors, such as what the chimes are made of, how long they are, and how thick they are. The most common substances for chimes are metal tubes, pipes, and rods, which you can find at hardware stores, craft stores, or from scrap metal.

[A]. Try to choose pipes that have a uniform thickness on all sides for an even tone. Pipes and tubes are the same in wind chimes.
[B]. Plastic vessels that are made from aluminum or brass are the best. They tend to be more durable, therefore creating thinner chimes.
[C]. Metal pipes and thicker tubes will make the chime hollow and rock when broken. Steel tubes will make the chime resonate and vibrate when broken down to about 21 feet (91.1 m).
[D]. You can take one of these materials and wear it until you are done. Experiment a little and decide what sound it will produce.
[A].