Lincoln says, "It is for us the living, rather, to be dedicated here to the unfinished work which they who fought here have thus far so nobly advanced." By "unfinished work" Lincoln is clearly referring to the Civil War. Which of the following is Lincoln also referring to in the same phrase?

A. The dedication of the cemetery at Gettysburg

B. Abolition of slavery

C. The defeat of English forces

D. The reinstatement of slavery in the North