Answer:
c. cognitive-behavioral therapy.
Step-by-step explanation:
Cognitive behavioral therapy also known as CBT is for short-term treatment It is a goal-oriented therapy treatment in psychology that takes a hands on and a practical approach towards problem-solving. Its main objective is to change the thinking pattern or behavior of a person which are behind the people's difficulties.
It improves mental health by focusing on changing cognitive distortions and behaviors.
In the context, Liz, an active smoker decides to quite smoking and approaches a therapist. The therapist uses cognitive behavioral therapy for her treatment and approaches her treatment accordingly by influencing her cognitive thoughts and behaviors.
Thus the correct option is (c).