In 2011, McDonald's was setting new sales recordsdespite a global economic slowdown and declining consumer confidence in theUSA. McDonald's performance in the marketplace made it the top performingcompany in the stock market. The company's success was a result of itswell-conceived and executed Plan-to-Win strategy that focused on "being better,not just bigger." Why do you think McDonald's could not keep its competitive advantageover time through implementing the same strategy?
please try to make the answer as short as you can , with simple English words and easy to remember in the exams.