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 advantage of chisel edge finish line is: 
Select and explain. 
A. Conservation of tooth structure, B. Provides adequate bulk of metal, C. Provides easy visualization on impression, D. All of the above
A: Conservation of tooth structure
Answer: A: Conservation of tooth structure 
Explanation: None