1) traders might be attacked by other civilizations and looters
2) They may disagree upon the pricing and the worth of traded items
3) One may want to get rid of a item, another may not want to buy it, resulting in hatred and eventually war if it becomes too 'aggressive'
hope this helps
Genesis is an account of the creation of the world and the origins of the Jewish people. It is divisible into two parts, the primeval history and the ancestral history.
The answer is D. 100%!! :)