What Did Ray Kroc Do When He Franchised McDonald's That

What did Ray Kroc do when he franchised McDonald's that set the bar for future franchise operations?

A) He provided training and support to franchisees to ensure that quality would be consistent in every McDonald's restaurant.
B) He licensed the McDonald's name to a wide variety of products such as hats and shirts.
C) He sold franchises in competing territories to encourage franchise owners to compete and come up with new innovations for the company.
D) He improved the quality of hamburgers and customer service.