How Does a Therapist Respond to Parents Who Refuse to Entertain

How does a therapist respond to parents who refuse to entertain the possibility that their child has any sort of behavior problem?

A) Tell them they are mistaken and cite specific examples to prove your point.
B) Tell them that it is clear from talking to them that they have played a significant role in contributing to their child's behavior problem.
C) Suggest that they talk to someone else who is an expert on the child's problem and can explain their child's behavior problem to them better.
D) Assure them that their child's problem is not uncommon and that many other children with similar problems have been greatly helped by therapy.