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
Growth of oral structures is mainly influenced by factors: 
Select and explain. 
A. Hereditary, B. Environmental, C. Hereditary-influenced by environmental factor, D. None of the above
C: Hereditary-influenced by environmental factor
Answer: C: Hereditary-influenced by environmental factor 
Explanation: Van Limborgh after review of the sutural theory, cartilaginous theory and functional matrix theory has summarized the following features:
1. Intrinsic genetic factor controls chondrocranial growth.
2. Epigenetic factors originating from skull cartilages and head tissues control desmocranial growth.
3. Local environmental factors, like tension forces and pressure, influence the growth of desmocranial growth.
4. General epigenetic and general environmental factors are less significant in craniofacial growth.
Key Concept:
Growth of oral structures is mainly inﬂuenced by factors Hereditary-inﬂuenced by environmental factors.