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
Main disadvantage of shoulder preparation is 
Select and explain. 
A. It is less conservative, B. May create lipping, C. Does not provide distinct margin, D. All of the above
A: It is less conservative
Answer: A: It is less conservative 
Explanation: None