All of them because they don't have capital letters at the start.
Joking apart, the real answer is C, because it doesn't have a comma. It should read "For at least three hours, Melissa has been singing the same song.
The correct answer here is D.
The Nature in classical romanticism poems is a force of good, respite,inspiration and tranquility. In Byron's Darkness it is clearly not. It is important to note that this poem was created after a catastrophic eruption of Mountain Tambora which severely affected and caused the abnormal weather across the globe. That is why the Nature as depicted here is different from the rest of the romanticism poems.
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