David ungar holds a Dunkin' Donuts franchise. The term of his franchise agreement require him to use only those ingredients furnished by Dunkin' Donuts. He os also required to buy its napkins, cup, and so on, with the Dunkin' Donuts trademarks on them. Is this an illegal trying arrangement? What if Dunkin' Donuts maintains that it needs these requirements to maintain it's quality levels on nationwide basis