The Client Is Using a Patient -Controlled Analgesia (PCA) Pump

The client is using a patient -controlled analgesia (PCA) pump with morphine to control pain. Prioritize the nursing interventions.
A) Instruct the client to use the patient -controlled analgesia (PCA) before the pain becomes severe.
B) Check the intravenous (IV) line for patency every 2 hours.
C) Assess the client's pain level and vital signs frequently.
D) Ask the physician is the client can switch to an oral analgesic.