Answer:
A
Step-by-step explanation:
The purpose of the Union blockade during the American Civil War was to block the entry of manufactured goods and overseas cotton sales from the Confederacy. The Union hoped that by cutting off the Confederacy's ability to sell its cotton to European markets, it could weaken the Southern economy and force the Confederacy to surrender. The blockade was also intended to prevent the Confederacy from receiving supplies and arms from Europe that could be used against the Union.