How did the Union blockade along the coast affect North Carolina?

Question

A)The port at Wilmington was forced to close.
B)Wilmington provided the only available port.
C)North Carolinians were unable to get goods from other places.
D)The blockade had little impact on the people of North Carolina.

Answer 1

Due to the fact that the Cape Fear River has two entrances separated by the Frying Pan Shoals, it was hard for the Union ships to catch blockade runners. Thus Wilmington became a particularly useful port for the Confederacy and could be used when other ports were rendered inaccessible by the US ships.

Answer 2

So which is it?

Answer 3

Thank You!