When the Nurse Notes That the Ureteral Catheter Is No

When the nurse notes that the ureteral catheter is no longer draining urine, the most appropriate action would be to

A) clamp the urethral catheter to promote drainage from the ureteral catheter.
B) do nothing, since this is a normal occurrence in the first 24 hours.
C) irrigate the ureteral catheter with 30 ml of sterile saline.
D) notify the physician immediately.