The form of exchange that is most commonly used in the United States today is option B. balanced reciprocity. The balanced reciprocity refers to the exchange of something with the expectation that another of same value will be returned within a certain time frame.
What is reciprocity?
In cultural anthropology, reciprocity means the non-market exchange of goods or labour ranging from direct barter (immediate exchange) to forms of gift exchange where a return is eventually expected (delayed exchange) as in the exchange of birthday gifts.
Therefore, the correct answer is as given above.
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