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
New auxiliary types: 
Select and explain. 
A. Dental hygienist with expanded duties, B. Frontier auxiliaries, C. Technotherapist, D. Dental licentiate, dental aide
D: Dental licentiate, dental aide
Answer: D: Dental licentiate, dental aide 
Explanation: None