Have a question about Abraham Lincoln's “The Gettysburg Address"?

According to Lincoln, how is the Civil War testing the United States?

A. The war is testing whether a nation dedicated to liberty and equality can survive.

B. The war is testing whether the American people have the will to fight.

C. The war is testing whether slavery will still exist in the United States.

D. The war is testing which is stronger and braver, the Northor the South.

Thx!!