The correct answer should be A. Whomever.
This is because this can be paraphrased as "the instructor has picked him" not "the instructor has picked he". Him corresponds to whomever while he corresponds to whoever.
Words such as 'bleak', 'dying', 'wrought', 'ghost', and 'sorrow' create an ominous and spooky atmosphere in "The Raven". These words have negative connotations, meaning that the words sound dark and frightening to the reader. For instance, if you wanted to create a spooky atmosphere in the following sentence, you might replace the verb with another word that has a more negative connotation.
A chill passed through the room.
A chill crept across the room.
While both sentences mean essentially the same thing, the second sentence sounds scarier because the verb has a more negative connotation.
Hope this helps!