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
Which dentifrices should be used for periodontal patients? 
Select and explain. 
A. Tooth powders with high abrasive content, B. Tooth pastes with high abrasive content, C. Tooth pastes with minimum abrasive content, D. All of the above
C: Tooth pastes with minimum abrasive content
Answer: C: Tooth pastes with minimum abrasive content 
Explanation: None