Answer:
A. A. Japan's ruler did not allow them to conduct business anywhere else.
John rolfe taught the jamestown settlers how to plant and harvest tabacco which saved the colony's economy
Farming/ slavery.
This answer really depends on what the question is asking, the southern economy banked heavily off of farming, BUT it was impossible to provide and have such an abundance of crops without slavery. So, it depends on the options you have.
Hope this helps, man!
Since then the Great Wall was built, rebuilt to protect the northern borders of the Chinese Empire from the Hun's and Mongolian attacks during the rule of successive dynasties.
