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 stages of early childhood caries were given by: 
Select and explain. 
A. Harris and Garcia-Godoy, B. Caufield and Griffen, C. Caufield and Tnnanoff, D. None of the above
A: Harris and Garcia-Godoy
Answer: A: Harris and Garcia-Godoy 
Explanation: The ECC is categorised in 4 stages by Harris and Garcia-Godoy based on the severity:

Very mild
Mild
Moderate
Severe