Corrado wants help to quit smoking. What kind of therapy should he pursue?

Corrado wants help to quit smoking. What kind of therapy should he pursue?
a)  Cognitive-behavioral therapy, to learn techniques to modify his behavior and extinguish his undesirable habits.
b)  Psychodynamic therapy, to explore his oral fixation and address the unconscious sexual significance cigarettes have in his life.
c)  Humanist therapy, so he can feel good about the choices he has already made in his life and accept the fact that he is a smokera good smoker.
d)  Existential therapy, so he can realize that smoking is symbolic of the end we all must face, and that cancer represents the pain of survival.