The answer to this question is that federal express has a core competence. Core competence is the main strenghts or advantages of a business or the company in order for them to become competitive in the market. The concept of Core competency was introduced by Gary Hamel and Prahalad. Core competency is what the business or company can do to their customers and their expertise that is unique that can be valued by the customers.
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The best example of how companies are upgrading themselves to meet changing customer preferences is personified in option (C) making online shopping services available.
Since customers nowadays prefer to shop online more often than not, many companies are now providing online marketplaces in combination with their traditional brick and mortar stores. Some companies do not even have a pop up store – they purely do their transactions online.