I would say that it's B because it appears that the shape of Han China is based off of trade routes.
Answer:
Checks and balances system I'm pretty sure.
Explanation:
The amendment becomes part of the Constitution when it has been ratified by three-fourths (currently 38) of the states. This process has been used for ratification of every amendment to the Constitution thus far. Article V also provides for an alternative process, which has never been utilized.
They both discouraged contact from outsiders.