The correct answer is A) reuniting the Union.
The " unfinished work " Lincoln mentions in paragraph 3 is reuniting the Union.
President Abraham Lincoln delivered the "Gettysburg Address" on November 19, 1863, at Gettysburgh, Pennsylvania. The site had been the place of the bloody Battle of Gettysburg of July 1 to 3, 1863, as part of the many battles during the US Civil War. The victory of the Union Army in the mentioned battle represented a turning point in the war in favor of the Union.
The other options of the question were B) completing the cemetery. C) dedicating the cemetery. D) defeating Lee at Gettysburg.
