The two closest terms are C. acculturation and assimilation.
Both terms refer to the process in which two cultures meet and interact and "borrow" some aspects of the other culture - the difference is that assimilation produces more similar culture.
In contrast appropriation is a one-way process: only one culture takes on the characteristics of another culture.
Answer:
Economic b/c people produce various goods and services
By creating common culture symbols such as the flag, national anthem, and motto
