The best answer choice that suggests the Raven in the poem represents a negative connotation is:
C. Line 63, when the speaker believes the Raven learned to say “Nevermore” “from some unhappy master.”
This line implies that the Raven carries a message of sorrow or misfortune, as it is linked to an "unhappy master" and the burdens of despair, which aligns with the negative associations of ravens in mythology.