How did the Union blockade of the southern coast affect the Confederacy? It forced the Confederacy to build new railroads.
It contributed to shortages of weapons and food.
It encouraged Europe to trade with the South.
It halted all trade, leaving the South without supplies.

How does the supremacy clause of the u.s. constitution affect the states? o a. it requires each state to establish a supreme court. b. it declares that the federal government can take away state powers if necessary. o c. it allows state governments to overthrow the federal government if necessary. o d. it ensures that the u.s. constitution overrules each state constitution