Answer:
C. Often requires many years of study, training, and practical counselling experience.
Step-by-step explanation:
Synthesizing the approaches covered in the text are time-consuming and require in-depth knowledge and practical experience. Otherwise, the results turn out to be ineffective and meaningless. This is why it requires a lot of study, training, and first-hand experience in the field of counselling. If you do not go through any of these then you would be unable to carry out the process in a proper manner in practical life.