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
Heavy forces on periodontal ligament causes: 
Select and explain. 
A. Hyalinization, B. Osteoclastic activity around tooth, C. Osteoblastic activity around tooth, D. Crest bone resorption
A: Hyalinization
Answer: A: Hyalinization 
Explanation: None