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
For cast restorations the cavity wall should have a taper of 
Select and explain. 
A. 30-45 degree, B. 5-10 degree, C. 2-5 degree, D. none of the above
C: 2-5 degree
Answer: C: 2-5 degree 
Explanation: None