B) They had a complex civilization that was destroyed by the Spanish conquerors.
By the time of the Spanish invasion, the Aztecs had devloped a strong civilizations, they had a system of trade & commerce and were quite wealthy. They also had a primitive form of "police" and a banking system.
The cause of the first Christian Crusade was mainly because of the Muslim Turks invading and taking over the Holy Land. The effect of the First Crusade was that the Christians captured Jerusalem and other key cities
Explanation:
Slavery in America during revolution