It would be C. is, it makes more sense saying "it is" and not "it are" or "it am"
<span>The correct asnwer is B, helplessness.
The repetition of the phrase "still is sitting" shows that the speaker is helpless to get the Raven to leave. Just as the speaker cannot make the Raven leave him, he is also unable to get over his grief at losing his true love. He will forever be grieving, and the Raven will forever sit above his chamber door.
Therefore, the mood created in this scene is one of helplessness. </span>
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The third one is the one that uses capitalization properly