A. Identify a Native American civilization of Mexico prior to 1518 and explain one factor that enabled it to rise to a population of 25 million. B. Identify and explain ONE factor which would explain the demographic change seen in this chart between 1518 to 1593.
C. Identify and explain a social OR cultural effect of the Spanish conquest of Mexico for Native Americans AFTER 1593.

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In 911, a group of vikings lead by rollo besieged paris and chartres. after a victory near chartres on 26 august, charles decided to negotiate with rollo. the talks were led by hervé, the archbishop of reims. this resulted in the treaty of saint-clair-sur-epte, which granted rollo and his soldiers all the land between the river epte and the sea. it also granted him brittany, "for his livelihood". at the time, brittany was an independent land which france had not been able to conquer. in exchange, rollo promised the king his loyalty and military assistance when needed. also rollo also agreed to be baptised and to marry gisela, the king's daughter. the territory given rollo is about the same as upper normandy. this would grow to become normandy under rollo's descendants. - wikepedia