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
Tissue stops in impression tray aids in 
Select and explain. 
A. Anterior posterior stabilization, B. Better acrylic flow, C. Proper retention, D. All of the above
A: Anterior posterior stabilization
Answer: A: Anterior posterior stabilization 
Explanation: None