Within the food service industry​ (restaurants that serve meals to​ customers, but not just fast​ food), find examples of firms that have sustained competitive advantage by competing on the basis of​ (1) cost​ leadership, (2)​ response, and​ (3) differentiation. Cite one example in each​ category; provide a sentence or two in support of each choice. ​(​Hint: A ​""99cents ​menu"" is very easily copied and is not a good source of sustained​ advantage.)

A. Institutional food services, such as Sodexho, as they offer food delivery to college campuses.
B. Fine dining restaurants, as they have almost the same menu and service.
C. Institutional food services, such as Sodexho, as they get their contracts by being low bidder to provide service.
D. Fine dining restaurants, as they are full service restaurants with specific dedicated meal courses.