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
Current concepts of "evaluating health care" require a scientific basis for treatment referred as: 
Select and explain. 
A. Evidence based therapy, B. Periodontal maintenance, C. Tooth mortality, D. Prevention of loss of attachment
A: Evidence based therapy
Answer: A: Evidence based therapy 
Explanation: None