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 term 'Primary Prevention' means all of the following except 
Select and explain. 
A. Planning the patient's diet, B. Prophylactic odontomy, C. Topical application of fluoride, D. Extending cavity preparation to prevent Recurrence
D: Extending cavity preparation to prevent Recurrence
Answer: D: Extending cavity preparation to prevent Recurrence 
Explanation: None