Read Case 28: "McDonald's in 2019", found in the back of your Strategic Management: Text and Cases textbook. Using your textbook content, industry experience, and the case assigned, answer the following questions in an initial thread of at least 300 words. Describe the six elements of the external environment as they apply to McDonald's, and argue for which one you think is the most important. Select one of these elements and describe some changes relating to the McDonald's case. Briefly explain the four criteria for sustainability of competitive advantages and how each relate to the McDonald's case.