Regarding Treatment for Children with the Symptoms of Oppositional Defiant

Regarding treatment for children with the symptoms of oppositional defiant disorder (ODD) :

A) Therapists should only work with the child in individual therapy because parents will interfere with treatment.
B) Later interventions in a child's life are better than earlier interventions.
C) Therapists must be patient while also firm and capable of developing appropriate behavioral strategies.
D) Medications that are specifically targeted to the symptoms of ODD should be used.
E) All of the above are important aspects of treating ODD.