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 direct bonded orthodontic stainless steel brackets derive retention with composite because of: 
Select and explain. 
A. The mechanical interlock with mesh at the bracket base, B. The chemical interlock of composite with bracket base, C. Both mechanical and chemical interlock of composite with the bracket base, D. Biological interlock between the tooth surface and bracket
A: The mechanical interlock with mesh at the bracket base
Answer: A: The mechanical interlock with mesh at the bracket base 
Explanation: None