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
Rinsing of the impression is important to 
Select and explain. 
A. Remove excess impression material, B. Remove saliva, C. Hydrate the impression, D. Accelerate the setting
B: Remove saliva
Answer: B: Remove saliva 
Explanation: None