Bill is interested in starting a new restaurant. His last name is McDonald. He is considering calling his business «McDonald's Burgers" He is worried McDonald's Corporation, which is famous for its Big Mac and golden arches, might take issue with his business name. Mariah and her siblings are starting a coffee bean business. Their family name is McDonald, and they would like to call their business "McDonald's Beans." Should Bill and Mariah be concerned about trademark infringement, and what type of infringement might it be? Trademark dilution?