The correct answer is D. Lincoln's Gettysburg Address focuses on the nature of democracy, defining it as "government of the people, by the people and for the people."
Lincoln's few selected words resonated throughout the nation and throughout history, challenging Lincoln's own prediction that "the world will notice little, not much time will remember what we say here." The speech emphasizes democracy and freedom as fundamental pillars of the United States, guaranteeing that these will not disappear from the earth.
Invoking the principles of equality of men enshrined in the Declaration of Independence, Lincoln redefined the Civil War as a new birth of freedom for the United States and its citizens.