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
Balanced force technique can be described as: 
Select and explain. 
A. Positioning and preloading an instrument with a clockwise rotation and shaping with a counter clockwise rotation., B. Insertion with a quarter turn clockwise rotation with slight apical pressure., C. Cutting 180 degree to 270 degree counterclockwise rotation with apical pressure., D. All of the above.
D: All of the above.
Answer: D: All of the above. 
Explanation: Balanced Force Technique
Balanced force technique was introduced by Roane et al, in 1985. In this technique, flex-R-files, flex-O files, or any other flexible files with a modified non-cutting tip are used.

Positioning and preloading an instrument with a clockwise rotation and shaping with a counter clock wise rotation
Insertion with a quarter-turn clockwise rotation with slight apical pressure 
Cutting 180°-270° counterclockwise rotation with apical pressure.