Lincoln's Gettysburg Address says that the United States was "conceived in Liberty and dedicated to the proposition that all men are created equal." Why did Lincoln make this statement?

he emphasized that the Declaration of Independence was designed to make all men equal and that the United States needed to live up to those ideals


He wanted to appeal to slave owners in the North so they would vote for him in the next election


he concluded that the United States should consider changing the principles it was founded on so that people could be equal


he believed that the South was free to secede from the Union so he would stop trying to reunite the nation and focus on equality in the North