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 factor does not contribute for maintaining occlusal stability? 
Select and explain. 
A. Embrasures, B. Tooth structure, C. Loss of teeth, D. Periodontal disease
A: Embrasures
Answer: A: Embrasures 
Explanation: None