Mcdonald's is operating in the quick-serve restaurant business. mcdonald's business model is a classic example of: a. a pioneering company that is working to cross the competitive chasm. b. a longstanding company that is using a niche strategy of pursuing a select customer segment of millennials to compete in a declining industry. c. a company competing in a growth industry utilizing the viral model of infection to gain lead adopters. d. a company in a fragmented industry that consolidated the industry through value innovation and used franchising and chaining to enjoy scale economies.