Which of the Following People Probably Has a Diagnosis of Undifferentiated

Which of the following people probably has a diagnosis of undifferentiated schizophrenia?

A) Matthias, who has the symptoms of schizophrenia, but he does not fit any one type
B) Valentina, who makes silly faces, laughs a lot, masturbates openly, and eats strange things
C) Walter, who thinks the Russians are trying to kidnap him because he is so important
D) Louise, who stands for hours the same strange position