I believe that the best thesis statement is the first one - Public schools should require students to wear uniforms because it will help eliminate bullying. It is the most formal one, the most complete one, and it covers everything that the author is going to talk about further down in the text. This is why it is the most suitable one to use.
Identify the best thesis statement below. Public schools should require students to wear uniforms because it will help eliminate bullying. Bullying behavior is a growing problem in public schools that needs to be corrected. Requiring uniforms in schools would help eliminate bullying. Students should be required to wear uniforms.