What qualitative research tool(s) would you recommend be used and why? What are the ethical issues that you should be sensitive to in this process?

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In February 2009, bushfires raced across the Australian state of Victoria, claiming lives and property. While rebuilding will take years, at some point after a disaster, it is time to get back to business. Suppose you are approached by the owners of several full-service wine stores in Victoria. They are uncertain about whether they should simply maintain the same positioning they had previous to the bushfires, and they would like a report within 60 days.
How could each orientation of qualitative research, namely, phenomenology, ethnography, grounded theory, and case studies be used here?
What qualitative research tool(s) would you recommend be used and why?
What are the ethical issues that you should be sensitive to in this process?

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