A bad thesis statement would be one that doesn’t have a debatable claim, a good thesis statement would be one that is really specific in addition to being debatable. Hope this helps!<3
Answer:
advertising on school grounds
Explanation:
This is the best option for a research paper because it can be researched without having too much information. The author of the essay could take a stand on whether or not advertising should be allowed on school grounds as well. The other topics are too broad and would need to be the size of a magazine or novel in order to be written about or explored with the depth necessary for a research paper.