I Believe it would be.....true?
A. Macbeth is losing his mind at this point and sees the ghost of Banquo. Which does raise some eyebrows from noblemen. :)
B is correct "A social commentator, who explains what a book says about people in general."
The correct answer is tone. Imagery is using vivid description while style is the personal type of narration like what words they use or grammatical constructions. Theme is the underlying idea while the voice is seen through the tone, whether it's dark and broody or joyful or anything similar.