Aclinical psychologist says, "i select the best treatment for a client based on the current recommendations outlined in research studies." this clinical psychologist believes in using:

According to this statement the clinical psychologist (doctor) believes in evidence-based treatment. An evidence based treatment can be defined as the treatment in which a doctor or psychologist used therapy in order to have a track of the effectiveness of the treatment of which the individuals are under an undergoing treatment that are to have been proven that the treatment actually works.

Under the evidence base treatment, psychologist finds those errors or problems which are causing the functioning of brain or errors which are making a person ill.

well to answer ur question to be completly honest

i would say b. research typically uses a variety of sources