Personification: The act of making a nonhuman object (inanimate) have human features (animate). Basically what this question is asking is what is the action emphasizing. So in this case the human action is shivered, what was shivering? the stars.
Without reading the paragraph this is a good guess. I would say War is irrational as the central idea and the supporting detail is Most people think war is irrational.
The right answer will be the B option. LESSER THAN MACBETH AND GREATER. Because this quotation is a paradox.
Have you figured out the answer yet?