McDonald's is operating in the quick-serve restaurant business. McDonald's business model is a classic example of:

franchise.

Explanation:

McDonald's is the leading company in the fast-service restaurant business, operating with the franchise business model.

Franchises are the act of commercially granting the use of a trademark and patent to third parties through a franchise agreement that will regulate the relationship between franchisor and franchisee.

A franchise will provide an already used and effective business model, in addition to providing the business know-how, and the standardization of products and services, which will make the product recognized and equal in any restaurant that has that brand, regardless of location, such as McDonald's, for example, which created value and a strong position in the market by increasing the concept of value to its products and services, which can be found anywhere in the world while maintaining quality and standardization.

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