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
Trauma from occlusion refers to 
Select and explain. 
A. Occlusion which causes trauma, B. Abnormally of the periodontium, C. Changes in periodontium due to occlusal forces, D. Inflammation of periodontium
C: Changes in periodontium due to occlusal forces
Answer: C: Changes in periodontium due to occlusal forces 
Explanation: None