A) What events in 1776 was Lincoln referring to? What happened 87 years before
1863?

Lincoln’s Gettysburg Address begins with the words, “Four score and seven years ago our fathers brought forth, upon this continent, a new nation, conceived in liberty, and dedicated to the proposition that all men are created equal.” A score is another way of saying 20, so Lincoln was referring to 1776, which was 87 years before 1863. Lincoln was declaring that the United States would continue to fight to preserve the nation that was created by the Founding Fathers who wrote the Declaration

study of past cultures

i think it’s will be a yes