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
Ideally the depth of undercut on the proposed abutment teeth at the most desired location is 
Select and explain. 
A. 0.010 inch, B. 0.015 inch, C. 0.020 inch, D. 0.030 inch
A: 0.010 inch
Answer: A: 0.010 inch 
Explanation: None