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
Curve passing through the buccal and lingual cusp tips of the mandibular buccal teeth is: 
Select and explain. 
A. Wilson curve, B. Mansoon curve, C. Curve of Spee, D. Catenary curve
A: Wilson curve
Answer: A: Wilson curve 
Explanation: None