C. They give real context to the narrator's opinions on race.hope this helps
He wants people to support him. He sought to emphasize the historic nature of the events at Pearl Harbor, implicitly urging the American people never to forget the attack and memorialize its date.
It emphasizes Usher's sense of terror.Repetitively saying "I dared not" shows his deep discomfort state of mind, whereas the parallel use of simple perfect tense in an interrogative sentence ("said I not") adds to the completely disoriented senses, as Usher can't tell the truth from the troublesome fiction of his own mind.
