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
Sibilant sounds are produced at: 
Select and explain. 
A. Rest position, B. Occluding position, C. Open from resting position, D. Between rest and occluding position
D: Between rest and occluding position
Answer: D: Between rest and occluding position 
Explanation: None