What main threats to it’s competitive advantage does Trader Joes face (in other words, how might it lose it’s competitive advantage)?

Using the relevant readings from class up until now, answer the following questions related to the Trader Joes case: Compare and contrast the competitive positions/strategies of Trader Joes, Whole Foods and Kroger. What are the key sources of Trader Joes’ competitive advantage? What main threats to it’s competitive advantage does Trader Joes face (in other words, how might it lose it’s competitive advantage)? Grading is based on three main areas: integration of case and concepts (60%), integration of prior cases & concepts (20%) and clarity / language (20%). See the assignment rubric. Correctly integrating the relevant vocabulary and concepts and developing your own Appendices (graphs & charts) demonstrates your mastery. Your essay must not exceed 1-page, single spaced, 1-inch margins, 12 point Arial font. You may have an additional 2 pages for graphs or charts and 1 page for works-cited.