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: Surgery
Myoplasty and sulcus extension procedures are
helpful in: 
Select and explain. 
A. Increasing retention, B. Increasing stability, C. Increasing support, D. Increasing retention and stability
D: Increasing retention and stability
Answer: D: Increasing retention and stability 
Explanation: None