Which of the Following Has Not Been Found in Research

Which of the following has not been found in research into adolescents who experience emotional disturbances?

A) Males display more internalizing problems and females display more externalizing problems.
B) Oppositional defiant disorder often predicts the more serious conduct disorder.
C) Rates of childhood and adolescent psychopathology nearly doubled after 1990.
D) Fewer than half of children and adolescents with serious emotional problems graduate from high school