It is based on the principle of federalism, where power is shared between the federal government and state governments. The powers of the federal government have generally expanded greatly since the Civil War.
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Explanation:
The Danube River, Carpathian Mountains, Rhine River, & Atlantic Ocean.
The borders of the Roman Empire, which fluctuated throughout the empire's history, were a combination of natural frontiers (the Rhine and Danube rivers to the north and east, the Atlantic to the west, and deserts to the south) and man-made fortifications which separated the lands of the empire from the "barbarian"
The surplus also helped Rome to establish trade ties with other Mediterranean powers, enhancing the city's economic might.
Rich volcanic soil makes the Po and Tiber river valleys ideally suited for agriculture. Historian Mike Anderson notes that volcanic ash made the soil near Rome some of the best in all of Europe. ... The surplus also helped Rome to establish trade ties with other Mediterranean powers, enhancing the city's economic might.
I believe that the answer is D
<span>Scientific cartography played a role in early European overseas expansion, but navigation remained a craft, not a science.
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Mayan people, Olmec, Zapotec, Mixtec, Toltec, Tarascan, and Aztec left fingerprints and traces of there culture in mesoamerica.
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