Which Is Most True Regarding Corey's Theoretical Orientation

Which is most true regarding Corey's theoretical orientation?

A) They subscribe to a single theory in its totality.
B) They do not have a theory, since a theory often blocks creativity.
C) They function within an integrative framework that they continue to modify as they practice.
D) They define themselves as cognitive-behavior therapists who are committed to short-term interventions.