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
A major criterion to differentiate between true Angle's Class III and a pseudo Angle's Class III is 
Select and explain. 
A. Degree of anterior cross bite, B. Presence of bilateral cross bite, C. Existence of a forward shift of the mandible during closure, D. Occlusal relationship between maxilla
C: Existence of a forward shift of the mandible during closure
Answer: C: Existence of a forward shift of the mandible during closure 
Explanation: None