Which Action by a Psychiatric Nurse Best Applies the Ethical

Which action by a psychiatric nurse best applies the ethical principle of autonomy?

A) Exploring alternative solutions with the patient, who then makes a choice.
B) Suggesting that two patients who were fighting be restricted to the unit.
C) Intervening when a self-mutilating patient attempts to harm self.
D) Staying with a patient demonstrating a high level of anxiety.