Answer:
A. To keep invaders out of China's walls
Explanation:
I'd say D. The article of Confederation didn't want the government to be too powerful and turn into a tyranny. They had a judicial branch though.
Islam arrived in sw Asia in a peaceful way through trade and interactions between Muslim merchants and locals. Hope this helps!
Slavery or master-servant
They were a form of people working to either pay off debts and become free, or work for their whole life to do a certain thing
hope this helps
