Answer:
D. The war must go on to reunite the Union and protect democracy and equality.
Step-by-step explanation:
“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. It is rather for us to be here dedicated to the great task remaining before us. . . .” .
What Abraham Lincoln mean when he said those words above quoted was that the war must continue to reunite the Union and protect democracy and equality.
Abraham Lincoln wrote it in 1864, and this version has been the most version often reproduced, particularly on the walls of the Lincoln Memorial in Washington DC.
in summary, Abraham Lincoln mean when saying those words was that theye must continue to fight or strive to protect and sustain democracy and equality which was fought for by their fathers because it is the sustainability of democracy and equality that will make the dead not to die in vain.