After Hiatal Hernia Repair Surgery,a Client Is on IV Pantoprazole

After hiatal hernia repair surgery,a client is on IV pantoprazole (Protonix) .The client asks the nurse why this medication is given since there is no history of ulcers.What response by the nurse is best?

A) "Bacteria can often cause ulcers."
B) "This operation often causes ulcers."
C) "The medication keeps your blood pH low."
D) "It prevents stress-related ulcers."