Problem: The PHNP reviews the chart for a 32-year-old man. A recent entry notes: "The patent was seen In urgent care accompanied by a coworker who reported the patient worked at his desk as usual in the morning, but later barricaded his office door with furniture and began yelling for people to stay away because "there was a man outside his office trying to kill him. Coworkers called 911 and police transported him to the emergency department, where the incident was resolved spontaneously. The patient has no history of psychiatric illness. Laboratory results show nothing unusual. This event was likely a sign of: A - brief psychotic disorder. B - shared psychotic disorder. C - posttraumatic stress disorder (PTSD). D - schizophreniform disorder.