Which nursing intervention demonstrates false imprisonment?

A) A confused and combative patient says, "I'm getting out of here and no one can stop me." The nurse restrains this patient without a health care provider's order and then promptly obtains an order.
B) A patient has been irritating, seeking the attention of nurses most of the day. Now a nurse escorts the patient down the hall, saying, "Stay in your room or you'll be put in seclusion."
C) An involuntarily hospitalized patient with suicidal ideation runs out of the psychiatric unit. A nurse rushes after the patient and convinces the patient to return to the unit.
D) An involuntarily hospitalized patient with suicidal ideation attempts to leave the unit. A nurse calls the security team and uses established protocols to prevent the patient from leaving.