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
After 6 years of age, the Lengthening of mandible occurs mainly 
Select and explain. 
A. at the symphysis, B. between the canines, C. Distal to first permanent molar, D. Along the lower border
C: Distal to first permanent molar
Answer: C: Distal to first permanent molar 
Explanation: None