A. Ironic situations
Satirical writing is often used to show how foolish a person or society can be. Often times it is used as a way for the author to show problems with social or governmental practices. In order to make fun of these things, the author often uses ironic situations. This way the reader can see the ridiculousness of the situation.
It seems to me that both A and C are true.
B is false. You really can't assume that your audience knows what text you are writing about.
Edgar can be a tricky man, but he is speaking of a lover that is no longer around. His lover is mentioned in stanza one, he feels that all is lost.
anyways the answer you're looking for here is that ; The speaker's love was unrequited
Your answer would be D) Simile.
This is because the clause compares the loneliness to a cloud, and similes are used to compare things, like "The food was as hot as the sun" or "The school was like a zoo".
I hope this helps!