Patterns of Reciprocity

Patterns of reciprocity:

A) no longer exist in societies with contemporary economic relations, which tend to be organized around the exchange of money for services.
B) still exist, even in contemporary societies that base economic relations on the exchange of money for services.
C) are a feature of human culture that emerged relatively recently in our history.
D) are not a characteristic of egalitarian or ranked societies.
E) have their roots in the rise of intensive agriculture and populous market towns.