The Parents of a 4-Year-Old Toddler Bring the Child to the Pediatrician

The parents of a 4-year-old toddler bring the child to the pediatrician because a lump is found in the toddler's waist area. Diagnostic testing verifies the toddler has a Wilms' tumor on the right kidney. The toddler is to be sent home until scheduled surgery. Which teaching is essential for the parents regarding preoperative care?

A) Promote hydration by increasing fluid intake.
B) Maintain a side position with pillows for sleeping.
C) Avoid palpating the tumor and pushing or lifting in the area.
D) Provide information about postoperative care.