This is a real-world medical entrance exam question, please give the true answer based on the question and selection. Topic name: None, Subject name: Dental
Earnest Klein has classified habits into 
Select and explain. 
A. Compulsive and non-compulsive habits, B. Intentional and non-intentional habits, C. Primary and secondary habits, D. Pressure and non-pressure habits
B: Intentional and non-intentional habits
Answer: B: Intentional and non-intentional habits 
Explanation: None