The significance of this scene is in the fact that the witches foretold that Macbeth would die only when the Birnam wood comes to him. They didn't specify the way that would happen, and when this happened, Macbeth knew that his time has come.
The correct answer here is D.
Prior to attack on Pearl Harbor which occurred, as the quote states, on <span>December 7th, 1941, the United States were officially a neutral party not involved in the War between the Allies and the Axis. The attack was unprovoked and resulted in the massive loss of life. That is why, because there was no imminent reason to attack the US, that that day will live in infamy.</span>
