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
Over contoured crowns are most often the result of 
Select and explain. 
A. Insufficient tooth reduction, B. Overbuilding by technicians, C. Desirable, if properly shaped, D. Increases retention
A: Insufficient tooth reduction
Answer: A: Insufficient tooth reduction 
Explanation: None