Answer: D. The narration makes little distinction between actual events and Prufrock's imagination.
Stream of consciousness is a type of narrative in which the author attempts to give the written equivalent of a character's thought processes. This is most often done in the form of an interior monologue mixed with the actions and events of the story. It is characterized by associative (and occasionally random) leaps in thought and lack of punctuation. Authors that are associated with this technique are James Joyce, William Faulkner, Marcel Proust, Virginia Woolf and T. S. Eliot.
