In simple terms "embassy" approach is:

Select one:

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a$.$ leveraging customers to virally promote a firm's products or services

b$.$ unifying the online presence where customers can interact with the firm.

c$.$ trading on essential goods and services with a view of making a profit by hiking prices at a time of high demand.

d$.$ polling a diverse crowd and aggregating opinions to form a forecast of an eventual outcome.

e$.$ establishing four different types of presence for e$-$commerce.