While caring for a patient scheduled for knee replacement surgery, the nurse provides cefazolin(antibiotic) as ordered 30 minutes preoperatively. Which statement indicates that teaching has been effective?

"This medication will replace vitamins and minerals that may be lost due to bleeding during surgery."

"This is a palliative medication to help ease the pain from surgery."

"This medication will help the surgeon identify areas of bone destruction due to arthritis."

"This antibiotic is given as a prophylactic to help reduce the risk of infection after surgery."