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
Force maintained at some appreciable fraction of the original from one patient visit to the next is: 
Select and explain. 
A. Continuous force, B. Intermittent force, C. Interrupted force, D. None of the above
A: Continuous force
Answer: A: Continuous force 
Explanation: None