TIME RUNNING OUT 10 POINTS Which of the following contributed most directly to the success of Scott’s plan to defeat the South?

the Battle of Bull Run, because it demonstrated the North’s advantages in military might
the election of 1864, because it ensured that Abraham Lincoln would remain as president
the Battle of the Monitor and Merrimac, because it showed the South could not defeat the Union blockade
the Emancipation Proclamation, because it encouraged enslaved Africans to support the North