Selecting a Topic is a process, not a one-time event.
When you receive the assignment, you'll select a topic of interest to you within the parameters of that project. But it doesn't end there! Next you'll do preliminary research to see what information is available and then you'll adjust your search based on how much -- or how little -- information is available. You may even find a related topic that interests you more.
Watch this video, created by NCSU Libraries, for a great description of this iterative process:
Unsure where to start?
Use one of these general resources to see if your prospective topic is interesting to you and to insure that there is research about it.