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: Pharmacology
Tetracycline is more preferred in periodontics because: 
Select and explain. 
A. It is broad spectrum antibiotic, B. It has anticollagenolytic effect, C. All of the above, D. None of the above
C: All of the above
Answer: C: All of the above 
Explanation: None