Answer:
connected the Potomac and Ohio Rivers
created a transportation link between the coast and the interior
improved trade routes
increased the amount of goods traded between the interior and the coast
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Cumberland road is important because it served as a gateway to the West for thousands of settlers
i don't know yet i will tell you later
I want to say C or D
Explanation: However I'm not 100% sure, though I do feel that it's more likely to be D
