Answer:
"I'll avoid eating or drinking anything 6 to 8 hours before the test."
Explanation:
Epigastric discomfort refers to the pain occuring in the upper abdomen in the region below ribs . This pain is usually felt right after eating or during eating.It is also referred as heartburn.
Barium swallow is used in the diagnosis of the gastro-esophageal reflux disorder helps to find the cause of the painful swallowing.
Hence the client should understand that he should not eat or drink anything 6 to 8 hours before the test. 
 
        
             
        
        
        
Oxygen and Carbon Dioxide
        
                    
             
        
        
        
The Jewish custom of A. prohibiting meat and dairy and D. prohibiting pork and shellfish conflicts with federal food program requirements.
<span>There are many laws that are part of Kashrut; two include prohibiting the consumption of foods such as pork and shellfish and the combining of dairy and meat. Foods that conform to the Jewish dietary regulations are known as  "Kosher."</span>