This is a real-world medical entrance exam question, please give the true answer based on the question and selection. Topic name: Miscellaneous, Subject name: Psychiatry
Typically changes in a problem behavior shows how many stages: 
Select and explain. 
A. 2, B. 3, C. 4, D. 5
D: 5
Answer: D: 5 
Explanation: According to the transtheoretical model, there are 5 stage of change in substance use and other problem behaviors. Pre- contemplation- Person taking substance does not think its a problem Contemplation- Stas realizing that he has a problem Preparation- Takes a decision & stas planning Action - Quits and makes change in behavior Maintenance