<span>A referendum allows people to vote to accept or reject a law.*
A referendum allows people to remove an official from office.
A referendum allows people to change laws or propose new ones.
A referendum allows people to impeach an official for wrongdoing.</span>
<span>The correct answer is The Union used its superior number of ships to keep the South from exporting or importing foreign goods. This strategy effectively exploited the Confederate weakness and weakened it economically. Without being able to export or import, the Confederacy was further weakened as it could not access goods needed or generate income.</span>