Which of the Following People Probably Would Have Had a Diagnosis

Which of the following people probably would have had a diagnosis of paranoid schizophrenia?

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