The correct answer is B: BARTER
Bartering is the exchange of material goods or services for other objects or services, and differs from the usual sale in that it does not intermediate the money as a representative of the value in the transaction. The contract whereby two people access a barter is called a swap.
it's because ancient greece was one of the strongest and advanced kingdom during that era. It surrounded by natural fortress that made it very isolated from the world.
But, many people from other nations acknowledge their intellectual advancement and came there to study.
The answer is "c. joe, who is socially isolated from friends and relatives".
The examination explored the connection between situational stress, quality of casual informal social networks and child abuse. Both situational stress and quality of interpersonal organization turned out to be critical indicators of manhandle. Individuals living in exceedingly distressing life circumstances who revealed solid informal communities were more averse to be abusers than individuals living in high pressure circumstances who announced powerless social networks.