The significance of the Porter within Macbeth is twofold. Primarily, the Porter functions as comic relief, lessening the tension in the audience after the murder of King Duncan. The Porter also serves a thematic function, indicating that the gates to Macbeth's home are synonymous with the gates of hell.
The answer is C) because it was quoted in the article. When a writer uses another article for their work they cite (put in quotations) the title of the article and anything they used from it or it will be plagiarizing
