Try to google it, ur gonna easily find it.
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.
Justice is blind is metaphor
The answer is B. the conflict moves the action forward and the reader wants to keep reading to see if that conflict gets resolved. if it's an ongoing conflict...then in that part if the sorry there is the course of action residing to the conflict