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': 'Which of the following treatment options are available for Division–b bone \nSelect and explain. \nA. Modification into division A bone by augmentation, B. Use of narrow diameter implants, C. Modification to other division by osteoplasty, D. All of the above', 'role': 'user'}, {'content': 'Answer: D \nExplanation: Three treatment options are available for the Division B edentulous ridge:\xa0\n\nModify the existing Division B ridge to another division by osteoplasty, to\xa0permit the placement of root-form implants 4 mm or greater in width.\xa0\nInsert a narrow Division B root-form implant.\xa0\nModify the existing Division B bone into Division A by augmentation.', 'role': 'assistant'}]