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
Which of the following is advantage of sub-marginal flop? 
Select and explain. 
A. Cause less gingival shrinking, B. Cause Less scars, C. Less intra-operative bleeding, D. None of the above
A: Cause less gingival shrinking
Answer: A: Cause less gingival shrinking 
Explanation: None