Answer
Trade brought new civilizations into contact with one another, it often led to the transfer of new technology, such as metals for tools and new farming techniques, from one region to another.
Explanation:
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Charlemagne extended the borders of the kingdom of the franks to the east and the south, he gained great tracts of territory from this act
they took all their supplies
Caves, i think is your answer. If not what are the choices?
Answer:
The Federal Reserve buys and sell government securities to control the money supply and interest rates.
