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
Lateral food impaction occurs mainly due to 
Select and explain. 
A. Un even alteration of occlusal surface, B. Open proximal contact, C. Open gingival embrasure, D. All of the above
C: Open gingival embrasure
Answer: C: Open gingival embrasure 
Explanation: None