A Psychiatric Nurse Is Assessing the Need for Mental Health

A psychiatric nurse is assessing the need for mental health services at the clinic.When estimating the number of patients with bipolar disorder in the community,the nurse places highest priority on which data-gathering technique?

A) Community forums that solicit data shared by patients and families
B) Epidemiological studies that indicate incidence and prevalence of disease
C) Use of key informants, such as local social service personnel, nurses, and physicians
D) Statistics from local public reports about race, marital status, population density, and substance abuse