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
Loss of several teeth may result in: 
Select and explain. 
A. Change in facial contour., B. Periodontal disturbances., C. TMJ disturbances., D. All of the above.
D: All of the above.
Answer: D: All of the above. 
Explanation: None