Final answer:
The priority nursing action when caring for a client with bipolar disorder is to monitor the client for escalating behavior.
Step-by-step explanation:
The priority nursing action when caring for a client with bipolar disorder is d. Monitor the client for escalating behavior. Bipolar disorder is characterized by mood swings and erratic behavior, so it is important for the nurse to closely monitor the client's behavior for any signs of escalation. This can help prevent potentially dangerous situations and ensure the safety of the client and others. Administering prescribed medications as scheduled is an important nursing action for managing bipolar disorder, but monitoring for escalating behavior takes priority as it involves ensuring the immediate safety of the client. Providing step-by-step instructions during hygiene activities and setting no limits for expected client behavior are also important aspects of caring for a client with bipolar disorder, but they are not the priority nursing action in this scenario.