Before calling a government agency with a request, you should

A) familiarize yourself with the case file.
B) review the agency's regulations.
C) make a list of the various documents you will be requesting.
D) All of these choices are correct.

Before contacting a government agency, it's important to be well-prepared. This includes familiarizing yourself with the case file to understand the context and specifics of your request, reviewing the agency's regulations to know the rules and procedures that govern how requests are handled, and making a list of the documents you will be requesting to ensure your communication is clear and comprehensive.