Final answer:
The nurse should help the patient clarify the meaning of the feelings to provide a therapeutic milieu.
Step-by-step explanation:
The nurse should choose option C, help the patient clarify the meaning of the feelings, to provide a therapeutic milieu for the patient.
This intervention involves assisting the patient in recognizing and understanding their emotions and perceptions. By doing so, the nurse can validate the patient's experience, promote self-awareness, and facilitate a sense of trust and safety. It can also help the patient develop coping mechanisms to manage their distress and reduce agitation.