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
Micro-organisms are able to damage immunoglobulin produced by host through? 
Select and explain. 
A. Hyaturonidase, B. Collagenase, C. Catalase, D. Protease
D: Protease
Answer: D: Protease 
Explanation: None