Answer:
Gold and salt were Africa's most valuable resources. Taxes were enforced on merchants who went on trade routes which made the kingdoms very wealthy. Arab merchants in North Africa introduced the religion of Islam to native Berber-speaking peoples. Berber traders then brought the religion south with them across the Sahara.
Explanation:
A, a class system. The feudal system itself was a system that separated and distinguished certain people by putting certain people above others. At the bottom were the the serfs. These were the servants. They worked for a lord, in exchange for food and protection from rival lords. Several lords reported to a king. In exchange for fighting for him, a king would pay lords by giving them portions of his land.
At the Constitutional Convention in 1787, the framers of the U.S. Constitution sought to build the foundations of a strong central government. But they also wanted to preserve the liberty of individual citizens, and ensure the government didn't abuse its power.