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
Teardrop tracing is obtained while recording: 
Select and explain. 
A. Chewing cycle., B. Protrusion., C. Retrusion., D. All of the above.
A: Chewing cycle.
Answer: A: Chewing cycle. 
Explanation: None