Which of the following geographic features kept people close to the Atlantic Ocean coast and made settlement of the west difficult in the late 1700s?
A.
the Missouri River
B.
the Mississippi River
C.
the Appalachians
D.
the Rocky Mountains
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a.. a conflict between her competing identities.. apex

the factors that the economies of the muslim empires prosper were:

1- land trade routes-located between three continents  

2- sea trade routes

trade contributed to the spread of muslim empires, and with that islamic culture led to a growing feeling of internationalism resulted in the transfer of technology, science, and other cultural forms.