The answer in this would likely be either a or b, though I'm leaning mostly toward b.
In the poem, Byron writes that daylight is "gaudy."
He does this to prove that daylight is overly bright and showy. His love is not like daylight -- she is not bright and showy.
That's why she walks like the night -- she does not need to flaunt her beauty. Her beauty is natural.
C. A detailed sentence involving all the points of your essay and each detail.
