What Does Research Imply About the Nature of the Unconscious

What does research imply about the nature of the unconscious?

A) It clearly exists but in a very different way than Freud imagined.
B) It clearly exists in much the same way that Freud imagined.
C) It clearly exists in much the same way that Jung envisioned it.
D) It may or may not exist as it is impossible to study material of which we are not aware.