The answer choice which represents how William used Lincoln's words at Gettysburg is; To introduce the idea that Gettysburg is significant because of what happened there.
<h3>Letter from a Union soldier analysis</h3>
According to the text;
The first paragraph goes thus; You have no doubt read in the papers the words of President Lincoln at Gettysburg: We cannotdedicate, we cannotconsecrate and we cannot hallow this ground.....
It follows from the paragraph that; Gettysburg is significant because of what happened there.
This passage is an example of indirect characterization through dialogue. I the conversation there is not much content to characterize Pat and Terrence but the audience can get to understand some things about each one's personality. The audience can infer that Terrence is more direct and extrovert while Pat is shy and introvert but there are not as many clues to be sure about this inferences.