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
Which of the following is not influenced by systemic disease: 
Select and explain. 
A. Periodontitis, B. Destructive periodontitis, C. Hereditary fibromatosis gingivitis, D. Chronic gingivitis
D: Chronic gingivitis
Answer: D: Chronic gingivitis 
Explanation: None