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
After the dentist has completed an etching procedure on a class III composite preparation, the preparation gets contaminated with saliva. In response, the dentist should do which of the following? 
Select and explain. 
A. Blow away the saliva with air, and then proceed, B. Rinse away the saliva with water, dry the preparation, then proceed, C. Wipe away the saliva with cotton pellet, rinse the preparation with water, dry it with air, and then proceed, D. Rinse away the saliva with water, dry the preparation with air, then repeats the etching procedure
D: Rinse away the saliva with water, dry the preparation with air, then repeats the etching procedure
Answer: D: Rinse away the saliva with water, dry the preparation with air, then repeats the etching procedure 
Explanation: None