Malinowski Study on Gifts and Other Forms of Exchange Among

Malinowski study on gifts and other forms of exchange among the Trobrianders and Boas's research on the potlatch of the Pacific Northwest,show that

A) market exchange is not necessary in traditional cultures.
B) there is balanced exchange present in all cultures.
C) in all economic systems,individuals and groups exchange goods and services with others,so exchange is a cultural universal.
D) redistribution of wealth is an important factor in every economic system.
E) forms of exchange have existed through centuries.