Answer:
The Neolithic Revolution, also called the Agricultural Revolution, marked the transition in human history from small, nomadic bands of hunter-gatherers to larger, agricultural settlements and early civilization. ... Civilizations and cities grew out of the innovations of the Neolithic Revolution
C. European population doubled, Native American population dropped greatly, and African Americans were sent to the Americas as slaves.
<span>By 800 Charlemagne was the undisputed ruler of Western Europe. His vast realm covered what are now France, Switzerland, Belgium, and the Netherlands. It included half of present-day Italy and Germany, part of Austria, and the Spanish March "border" (this region, known then as “Marcia Hispánica”, was governed by the Counts of Barcelona on behalf of the Franks). The broad March reached to the Ebro River. After establishing the seat of government at Aix-la-Chapelle (Aachen in German), Charlemagne restored much of the unity of the old Roman Empire and paved the way for the development of the Holy Roman Empire. </span>
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