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
Which of the following prevents fracture of MO amalgam: 
Select and explain. 
A. Beveling of axiopulpal line angle, B. Occlusal dovetails, C. Pin retained amalgam, D. Removal of unsupported enamel rods
A: Beveling of axiopulpal line angle
Answer: A: Beveling of axiopulpal line angle 
Explanation: None