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
Mean value articulator is: 
Select and explain. 
A. 3 point articulator., B. Non-adjustable articulator., C. Non arcon type articulator., D. All of the above.
D: All of the above.
Answer: D: All of the above. 
Explanation: None