To Gain Access to a Formal Criminal Justice Organization for the Purpose

To gain access to a formal criminal justice organization for the purpose of conducting field research, which of the following steps should be followed?

A) find an informant and then send a letter to gain access
B) find a sponsor, send a letter, follow up with a phone call and then set up a meeting
C) telephone the agency and speak with the director and set up a meeting
D) field research cannot be done in formal criminal justice organizations, only use of written records is allowed