The answer is "D. They transported goods across desert regions."
True, but it was also so they could send goods and other needed resources down river and cut travel time.
The correct answer is maintain international peace and security.
After world war 2 the countries of the world realized that they had to prevent another such war from ever happening again. They tried to do it even after world war 1 with the league of nations but that project failed as it didn't have the support of various armies from the world such as the US army. The United Nations however got even Americans on board and still exists today.
Well, we are going to have to make more!
Lets make bigger ones.
(Arms race.)
Answer:
Violence, lack of access to education, and extreme poverty are three factors that lead to human trafficking.
