Which of the following systems of trade was most widely used in both ancient river civilizations and ancient Native American civilizations? (4 points) a
bartering

b
the exchange of coined money

c
free exchange

d
international trade

Bartering

Explanation:

Bartering system of trade was most widely used in both ancient river Civilization and ancient native American civilization due to the following reasons: - Services and goods are traded in bartering with another person where there is no money involved.

answer; i believe that the correct answer is (behavioristic)good luck

answer; the civil right act of 1964;