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
Functional matrix theory suggests that the determinant growth of skeletal tissues resides in: 
Select and explain. 
A. Skeletal, B. Sutures, C. Cartilages, D. Non-skeletal tissues
D: Non-skeletal tissues
Answer: D: Non-skeletal tissues 
Explanation: None