A nurse is caring for a client who has an indwelling catheter with a urinary drainage system. Which of the following actions should the nurse take?

A: The tubing should not be coiled on the bed, especially not above the collection bag, as this can interfere with the drainage of urine and increase the risk of infection. B: The drainage bag should always be kept below the level of the bladder during ambulation to prevent backflow and reduce the risk of infection. C: Securing the catheter tubing to the lower abdomen (for male clients) or thigh (for female clients) helps to reduce the risk of catheter displacement and trauma. Proper securing also prevents unnecessary tension on the tubing, which can cause urethral irritation. D: A sterile specimen should be collected from the sampling port of the catheter tubing, not directly from the drainage bag, which could lead to contamination.