The nurse is initiating a 24-hour urine collection for a client with an indwelling urinary catheter. After emptying all the urine from the collection bag, which action is most important for the nurse to implement?

Start the collection time now and stop the collection the next day at the same time.

Provide catheter care at the urinary site to prevent contamination of the specimens.

Clamp the catheter to control urine flow during the collection period.

Label the collection container with the client’s name and start time.