I would think the answer would be b.
If you read the poem slowly and think about it, you get this mysterious type of feel.
This explains the tapping on the window, and later the knocking on the door.
Therefore the mood is mysterious.
Answer:
"Once upon a midnight dreary, while I pondered, weak and weary,"
Explanation:
You are welcome
Science literature is often held back by facts, where you can express yourself, like an expository essay since they are held back by facts as well. Plain fiction is all up to the author with nothing holding them back, like an argumentative essay would be since it’s opinionated.
