Answer:
franchise
Explanation:
A franchise is an authorization given by the company to an individual or a group to carry out commercial activities in the name of the parent company.
A franchise enables others to invest or franchisee in order to operate the business. The individual have to pay a franchisee fee to the company or the brand and gets permission to run businesses under the franchisee's name for a specified number of years or period and his assistance also.
In the context, Bobby and Enrique owns an independent and thriving sandwich shop. Their business is on the top and the sales are high. They wished to expand their business and open multiple sandwich shop but do not have enough budget for the investment.
So the best type of business for them is to give franchisee to others so as to expand their business and also to earn some capital in terms of franchisee fee.