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: Surgery
Ideal rhythm of Distraction osteogenesis is? 
Select and explain. 
A. Continuous, B. 0.25 mm four times a day, C. 0.33 mm three times a day, D. 1.0 mm four times a day.
A: Continuous
Answer: A: Continuous 
Explanation: None