Which of the following illustrates the idea that states may exercise powers not specifically reserved for the federal government

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modern american cars are not available due to trade restrictions

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.

citizens were able to charge more for their goods and services