Which of the Following Describes Allegiance Effects in Psychotherapy

Which of the following describes allegiance effects in psychotherapy?

A) Psychotherapists tend to use the form of therapy they encountered first in training.
B) Psychotherapists tend to use the forms of therapy they are reimbursed by insurance companies.
C) Patients tend to seek out those therapists who will give them "a break" when they bill for their time.
D) Psychotherapy researchers tend to find evidence that their preferred form of therapy is more effective than other forms.