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 treating a case with rampant caries: 
Select and explain. 
A. Restrict intake of sweets only, B. Allow no sugar for 21 days, C. Allow no sugar for 7 days, D. None of the above
B: Allow no sugar for 21 days
Answer: B: Allow no sugar for 21 days 
Explanation: None