Question

Which best states the three main Northern strategies for winning the Civil War?
selling cotton to Europe, blockading Southern ports, and controlling the Mississippi River
capturing the Confederate capital, defending itself until the South tired of the war, and blockading Southern ports
blockading Southern ports, controlling the Mississippi River, and capturing the Confederate capital
selling cotton to Europe, defending itself until the South tired of the war, and controlling the Mississippi River

Answer 1

"Blockading Southern ports, controlling the Mississippi River, and capturing the Confederate capital."
This was essentially the Union's Anaconda Plan: block trade, split the Confederacy, and seize Richmond.