D. Plains Indians started hunting buffalo more efficiently.
This helped them move more accessibly throughout the land.
Trade and commerce contributed to the growth of cities as it led to economic development.
<h3>What is trade?</h3>
It should be noted that trade simply means the act of buying and selling of goods and services.
In this case, trade and commerce contributed to the growth of cities as it led to economic development.
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Benjamin Franklin is one.
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