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
In Caries Assessment Test (CAT), which condition doesn't come in highest risk category? 
Select and explain. 
A. Isolated with spot lesion on tooth, B. Enamel hypoplasia, C. Child with special care need, D. Visible plaque on anterior teeth
A: Isolated with spot lesion on tooth
Answer: A: Isolated with spot lesion on tooth 
Explanation: None