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
Which of the following treatment options are available for Division–b bone 
Select and explain. 
A. 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
D: All of the above
Answer: D: All of the above 
Explanation: Three treatment options are available for the Division B edentulous ridge: 

Modify the existing Division B ridge to another division by osteoplasty, to permit the placement of root-form implants 4 mm or greater in width. 
Insert a narrow Division B root-form implant. 
Modify the existing Division B bone into Division A by augmentation.