The Name of the Approach for the Behavioural- Disordered Child

The name of the approach for the behavioural- disordered child where the assumption is that the behaviour disorders are a function of the reciprocity between a child and the environment, and where problems are the result of agitated transactions between the child and those in the environment is

A) psychodynamic.
B) ecological.
C) psychosocial.
D) biophysical.
E) behavioural.