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
Rampant caries should be applied to a caries rate of: 
Select and explain. 
A. 5 or more new lesions per year., B. 7 or more new lesions per year., C. 10 or more new lesions per year., D. 15 or more new lesions per year.
C: 10 or more new lesions per year.
Answer: C: 10 or more new lesions per year. 
Explanation: None