What was the main reason the Union blockaded the port of Savannah during the Civil War?

(1 point)
• To prevent needed supplies from entering the Confederacy
To lessen the freight load of the southern railroads
• To force the Confederacy to move its capital city
• To force the Confederacy to only trade with Britain

The main reason the Union blockaded the port of Savannah during the Civil War was to prevent needed supplies from entering the Confederacy.