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
[{'content': 'Relapse after orthodontic tooth movement is due to \nSelect and explain. \nA. Supracrestal gingival fibers, B. Abnormal pressure habits, C. Improper angulation of the teeth, D. All of the above', 'role': 'user'}, {'content': 'Answer: D \nExplanation: None', 'role': 'assistant'}]