An adult client is admitted to the medical unit due to rectal bleeding after a colonoscopy in which a polyp was biopsied and cauterized. Which Intervention should the nurse do first?

A. While assessing peripheral pulses is important, it's not the priority in this situation. The primary concern is the rectal bleeding. B. These exercises are important to prevent postoperative complications like pneumonia, but they are not the immediate priority when a patient is experiencing rectal bleeding. C. Assessing the abdomen will help determine the severity of the bleeding, identify any signs of abdominal distention or tenderness, and provide crucial information for further interventions. D. Monitoring fluid intake and output is important for any patient, but it's not the initial priority when a patient is actively bleeding.