What was the main reason the Union blockaded the past of Severnath during the Chil War? (સી)

Tegrevent needed suppleston entering the Confederacy

To lesson the reght bad of the stuben taitais

To lice the Criederacy to mexe is capital oly

To berce the Confederacy to anty trade with Brinth

The main reason the Union blockaded the ports of the Confederacy during the Civil War was to cut off their supply lines and weaken their economy.