How many demerit points may cause your class B or E driver's license to be suspended?

Answer: B — Eight

If you have a class B or E driver's license, you are allowed to have a certain number of demerit points before your license is suspended. This number varies depending on the state or country you live in. However, options A, C, and D are incorrect as they give different numbers than the one specified in the question. This means that if you have six, ten, or twelve demerit points, your license may not necessarily be suspended. It is important to always double check the specific laws and regulations for your state or country to determine the exact number of demerit points allowed before your license is suspended.