Which of the Following Was NOT a Finding of a Recent

Which of the following was NOT a finding of a recent Canadian survey of aberrant behaviour among children, adolescents and adults with developmental disabilities?

A) The frequency of problem behaviours did not vary according to sex.
B) The frequency of problem behaviours diminished with age.
C) One of the most frequently reported behaviours was pica (eating inedible substances) .
D) Aggression and depression were the most common psychological problems reported in the older group.
E) The type and intensity of behaviour varied according to the degree of disability, age, and sex of the child.