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
Increased VDO results in 
Select and explain. 
A. Strained facial appearance, B. Trauma to underlying tissues, C. Clicking of teeth, D. All of the above
D: All of the above
Answer: D: All of the above 
Explanation: None