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 a MO cavity prepared for inlay, mechanical advantage
to prevent proximal displacement of the restoration is
by establishing: 
Select and explain. 
A. Adequate pulpal depth, B. Parallel walls, C. Occlusal dovetail, D. Acute lingual inclination in axiogingival area
C: Occlusal dovetail
Answer: C: Occlusal dovetail 
Explanation: None