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 depth in posterior palatal seal area of denture 
causes: 
Select and explain. 
A. Tingling sensation, B. Gagging, C. Increased retention, D. Unseating of denture base
D: Unseating of denture base
Answer: D: Unseating of denture base 
Explanation: None