Which intervention is most important to preventing dermatitis in the patient who is incontinent following a recent cervical spinal cord injury?

The 78-year-old resident of a nursing home is brought to the emergency department for abdominal pain that is not responsive to oxycodone. She takes captopril, atenolol, lovastatin, and glyburide in addition to the oxycodone. Upon assessment, her abdomen is full and mildly tender. She has positive bowel sounds and reports passing gas but no stools for 96 hours. She denies anorexia or vomiting. A digital rectal examination is performed and stool is found in the rectum. The nurse anticipates being ordered to perform which intervention for this patient?  

The nurse is supervising the nursing student in the provision of a complete bed bath to the patient. Which action by the nursing student indicates successful learning?