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
In amalgam cavity preparation the cavosurface beveled at: 
Select and explain. 
A. Less than 90°, B. Less than 45°, C. More than 10°, D. At an obtuse angle
D: At an obtuse angle
Answer: D: At an obtuse angle 
Explanation: None