the most efficient method of franchising from the franchiser's point of view which has become popular in the 1990 and permits one franchisee to hold

the most efficient method of franchising from the franchiser's point of view which has become popular in the 1990 and permits one franchisee to hold several franchises from the same franchise company is called: A) conversion franchising B)multi-unit franchising C)piggybacking D)master franchising