Answer:
B. Using smoking a cigarette as a reward for longer and longer periods of not smoking.
Step-by-step explanation:
As we can see in the text presented in the question above, Lisa only smoked the cigarette that was associated with pleasurable emotional functions, as she is determined to stop smoking, every time she spends a lot of time without smoking, she rewards herself with a cigarette, the which promotes a positive emotional feeling, makes her stop smoking gradually and allows her to start associating the cigarette with a bad thing, which prevents her from spending more time without smoking.
He initiated this through the principles of Applied Behavior Analysis, which is the psychological philosophy that focuses on changing people's behaviors based on changes in the environment and its factors.