A 50- year-old Iranian woman being treated for an ankle sprain casually reports having had a conversation with a deceased relative. The emergency department physician is concerned that she has had both auditory and visual hallucinations and asks the psychiatrist to rule out psychotic disorder. At the interview, the woman endorses having had, on multiple occassions, visits from her deceased mother, in which she has conversations with her and gets advice concerning psychosocial matters. She is not distressed by the incidents and, in fact, finds there experiences to be spiritual blessings. She does not exhibit any other symptoms of psychotic disorder. Her mental status examination is remarkable for a pleasant and cooperative demeanor, normal mood, and full range of affect. Her thought process in linear. During the interview, her husband corroborates her attitude that these are real spiritual experiences and wonders why a psychiatrist has been called to interview his wife. The Frasi- speaking interpreter says that the woman's story is common among Iranian immigrants. What is the likely diagnosis?

A. Brief psychotic disorder.
B. Culturally appropriate behavior.
C. Schizophrenia.
D. Shared psychotic disorder (folie a deux).