A Frequent "Error of Omission" by Therapists Who Work with Clients

A frequent "error of omission" by therapists who work with clients from cultural backgrounds different from their own is:

A) failure to raise the topic of how racial and ethnic differences might affect the therapy relationship and treatment.
B) failure to identify their own race and ethnicity upfront so the client understands where you might be coming from.
C) failure to disclose the specifics of your biases,thus allowing one's unconscious racism to impact the therapy relationship.
D) failure to refer a client from a different cultural background to a racially/ethnically matched therapist.