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
The device is used for 
Select and explain. 
A. Vertical dimension, B. Horizontal dimension, C. Orientation jaw relation, D. All of the above
A: Vertical dimension
Answer: A: Vertical dimension 
Explanation: Power point (maximum biting force): 
Boos (1940) demonstrated that the maximum biting force in an  individual is registered at vertical dimension at rest. 

The method involved attaching a pressure indicating gauge which displayed the biting pressure, to a central bearing plate and screw on the occlusal rims as previously described. 
The device is called bimeter and the maximum biting point is termed as power point. 
The screw is adjusted to increase or decrease the vertical dimension and the bite force is recorded with each insertion. Boos stated that the vertical dimension of  occlusion is the rest position or maximum force minus 2 mm.