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
Maternally derived Streptococcus mutant disease is: 
Select and explain. 
A. Rampant caries., B. Haemoglobinopathy., C. Early childhood caries., D. All of the above.
C: Early childhood caries.
Answer: C: Early childhood caries. 
Explanation: None