The Marriott Corporation is in the following businesses, among others: Hotels of different types Long-stay residential hotels Luxury resorts Time-share properties Airline catering Institutional food services Franchised operations Credit card tie-ins Travel operations Given the above listing, would you say that Marriott’s business lineup reflects a strategy of related or unrelated diversification? Explain your answer in terms of the extent to which the value chains of Marriott's different businesses seem to have competitively valuable cross-business relationships.