A nurse is caring for a toddler whose parent states while bathing the child she noticed a mass in his abdominal area and that his urine is a pink color. Which of the following actions is the nurse's priority?

A. Obtaining a urine specimen is important for assessment of hematuria but is not the immediate priority. B. Scheduling an abdominal ultrasound is necessary for diagnosis, but delaying action could risk tumor rupture if the abdomen is manipulated. C. Assessing pain is relevant, but preventing harm takes precedence in suspected Wilms’ tumor. D. Instructing the parent to avoid pressing on the abdominal area is the priority because Wilms’ tumor is a fragile renal tumor; palpation or pressure can cause tumor rupture, hemorrhage, or metastasis. Ensuring the child’s safety is the first action before further diagnostic evaluation.