In this excerpt from Lincoln's First Inaugural Address, he argues that the divided Northerners and Southerners must stay united: We are not enemies, but friends. We must not be enemies. Though passion may have strained it must not break our bonds of affection. The mystic chords of memory, stretching from every battlefield and patriot grave to every living heart and hearthstone all over this broad land, will yet swell the chorus of the Union, when again touched, as surely they will be, by the better angels of our nature. Which type of appeal does President Lincoln use in this excerpt?
A. emotional appeal
B. ethical appeal
C. logical appeal
D. moral appeal