The Nurse Is Initiating a Client-Controlled Anesthesia (PCA)pump Delivering Morphine

The nurse is initiating a client-controlled anesthesia (PCA) pump delivering morphine sulfate for an older school-age client post-appendectomy.Prior to connecting the PCA tubing to the client's IV fluid line,which action by the nurse is the priority?

A) Clamping the PCA tubing
B) Delivering the loading dose
C) Setting the safety parameters for the infusion on the PCA pump
D) Clamping the client's primary IV fluid line