Choose the correct example of cost leadership and its explanation below.

A. Family style restaurants, as they have a playground or seating area for children.
B. Institutional food services, such as Sodexho, as they offer food delivery to college campuses.
C. Institutional food services, such as Sodexho, as they get their contracts by being low bidder to provide service.
D. Family style restaurants comma as food is often served on platters and the diners serve themselves.