Answer:
A. addressing the first-person in plural mode
Step-by-step explanation:
By referring the audience in the first-person plural mode, the authors or speaker can create unity between them and the audience. Using 'We' in your sentences, the author/speaker is addressing the audience/reader in first-person in plural form.
Lincoln, in his speech during the time of war, creates a united feeling between him and the people by using 'we' in his sentences. By including 'we' in the sentence, Lincoln emphasized that they were fighting it together.