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
Post dam area serves mainly to: 
Select and explain. 
A. Prevent ingress of food and saliva beneath denture base, B. Preventing Lifting away of denture during incising, C. Stabilize the denture, D. All of the above
B: Preventing Lifting away of denture during incising
Answer: B: Preventing Lifting away of denture during incising 
Explanation: None