Final answer:
The correct option is c.
A nurse's first action after observing a client with acute mania hit another client should be to call for assistance to ensure safety. Subsequent actions include checking the injured client for any injuries and considering further interventions like restraint or medication.
Step-by-step explanation:
The question is related to the appropriate immediate actions for a nurse to take following an incident of violence in a mental health unit. The first action the nurse should take is to call for a team of staff members to help with the situation, as the immediate priority is to ensure the safety of everyone present and to prevent further injury.
This is essential in managing a volatile situation and provides the opportunity for the nurse to then administer further necessary interventions, such as obtaining a prescription for restraint or administering medication.
Once the situation is under control and safety is established, the nurse should then check the injured client for injuries to determine the need for medical care.