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
School water fluoridation was first initiated in 
Select and explain. 
A. Seagrove, North Carolina, B. St. Thomas virgin islands, C. Elk lake, Pennsylvania, D. Pike country, Kentucky
B: St. Thomas virgin islands
Answer: B: St. Thomas virgin islands 
Explanation: None