Final answer:
Option D, Cognitive Behavioral Therapy (CBT) is the philosophical tradition that emphasizes self-reflection and therapy in the pursuit of happiness.
Step-by-step explanation:
The philosophical tradition that emphasizes the role of self-reflection and therapy in achieving a state of happiness is Cognitive Behavioral Therapy (CBT). This psychological approach focuses on addressing negative patterns of thought to improve emotional regulation and develop personal coping strategies that target solving current problems. CBT is based on the concept that thoughts, feelings, and behaviors are interconnected, and that changing negative thought patterns can lead to changes in feelings and behaviors, which is essential for achieving well-being and happiness.
Additionally, the fields of positive psychology and humanist approaches, such as those represented by Maslow's hierarchy of needs, also suggest that self-reflection, along with the practice of positive habits, can lead to a more fulfilling and happy life.