The answer is B, Mystical Blue
It is stated in the beginning of the poem
"set in the window, bringing memories, of fruit tree laden by low singing rills, and dewy dawns, and mystical blue skies"
Robespierre was an idealist: he wanted to create and establish a Utopian society. The power he came to wield, went to his head, and was the cause of his downfall.
Napoleon was a pragmatist: intent on both self-aggrandizement, and the glorification of France. Needless to say from a practical point of view, the latter was far more successful than the former.
The answer I got from the test was C.
