Answer:I believe the answer is c
Explanation:
The best and most correct answer among the choices provided by your question is the first choice.
The map describes the Louisiana Purchase.
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Answer:
The development of new cities-Louisville, Cincinnati, St. Louis, and Buffalo-away from the Atlantic coast was possible because they had access rivers that made it easy for them to trade.
Validity," since this means that the claims are "valid" and therefore come from reliable and trustworthy sources