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
The main disadvantage of using wing shaped rubber dam retainer is: 
Select and explain. 
A. It does not provide extra retention of the rubber dam, B. Laceration to the gingival tissue, C. Interferes with placement of matrix band, D. None of the above
C: Interferes with placement of matrix band
Answer: C: Interferes with placement of matrix band 
Explanation: None