Which line show how macbeth reacts to duncan's plans for his son, malcolm? a. i'll make myself the harbinger, and make joyful the hearing of my wife with your approach. b. the service and the loyalty i owe, in doing it pays itself. c. that is a step on which i must fall down, or else o'erleap, for in my way it lies. d. which do but what they should by doing everything safe toward your love and honor.