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
Vomiting during impression making procedures may be 
prevented by: 
Select and explain. 
A. Sedating the patient, B. Injecting local anesthetic, C. Asking patient to come empty stomach, D. Change the impression material
B: Injecting local anesthetic
Answer: B: Injecting local anesthetic 
Explanation: None