Which of the Following Statements Is Accurate Regarding Empirical Approaches

Which of the following statements is accurate regarding empirical approaches to classification?

A) Norms do not exist for different age and gender groups.
B) Agreement between different kinds of raters (e.g., teachers and parents) on a child's scores is very high.
C) The validity of the broad-band distinctions is questionable since different broad-band syndromes emerge when different types of people complete the instruments.
D) The finding that scores from clinic samples differ from nonclinic samples supports the validity of this approach.