The correct interpretation of the passage from The Gettysburg Address is:
Lincoln contrasts the soldiers' sacrifices with the current struggles of the nation, urging the living to focus on the work ahead rather than dwelling on past achievements.
In this part of the address, Lincoln acknowledges the sacrifices made by those who fought but emphasizes that their efforts should inspire the living to continue working towards the ideals of liberty and equality. He shifts the focus from honoring the dead to the responsibility of the living to complete the "unfinished work" of ensuring a nation that upholds the principles for which the soldiers fought. This notion of dedication to future tasks underlines Lincoln’s message that while the past is honored, the future requires active engagement and commitment to continue the struggle for the nation’s values.