Time left $0$:$11$:$43$

Bobby Winchester has come up with the idea of a system for picking up people's cars while they are at work, washing and waxing them, and returning them for a fee. Having been a big success in his home city, Bobby plans to expand his operation into other cities. The service described here seems best suited to

a$.$ vertically$-$integrated retailing.

b$.$ franchising.

c$.$ direct$-$response retailing.

d$.$ corporate chain retailing.

e$.$ off$-$price retailing.