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
The mechanism of Action of EDTA is 
Select and explain. 
A. Antibacterial by causing cell wall damage, B. Chelates Calcium ions and removes calcification, C. Both, D. None
C: Both
Answer: C: Both 
Explanation: None