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
Divergence from contact area in proximal surfaces
causes embrasures: 
Select and explain. 
A. Facially, B. Lingually, C. Cervically, D. Facially, lingually, cervically & occlusally
D: Facially, lingually, cervically & occlusally
Answer: D: Facially, lingually, cervically & occlusally 
Explanation: None