What is the resolution of the white heron by Sarah Orne Jewett?

2read this passage from "the raven." what is puzzling the speaker in this stanza? 60% but the raven still beguiling my sad fancy into smiling, straight i wheeled a cushioned seat in front of bird, and bust and door then, upon the velvet sinking, i betook myself to linking fancy unto fancy, thinking what this ominous bird of yore- what this grim, ungainly, ghastly, gaunt and ominous bird of yore meant in croaking "nevermore." s and what the raven's message is why the raven came to visit where the raven came from how the raven got into his room

What is the main idea of this paragraph from the volcanoes section of the ready.gov website

Aprimary source: a- may be biased b- is never biased c- cannot possibly have bias d- none of the above