Research on the Impact of Matching the Client's Race and Ethnicity

Research on the impact of matching the client's race and ethnicity with the therapist's indicates that

A) racial matching is crucial to success,but ethnic matching is less conclusive.
B) there is no solid evidence that outcomes are diminished when client and therapist are not matched.
C) while clients do not care whether there is a match,outcomes are influenced by a lack of matching.
D) racial matching is crucial to success,but matching on the client's primary language is not.