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
Medium thickness rubber dam is: 
Select and explain. 
A. 0.006 inch, B. 0.008 inch, C. 0.010 inch, D. 0.014 inch
B: 0.008 inch
Answer: B: 0.008 inch 
Explanation: None