What Are the Four Broad Types of Departments and Agencies

What are the four broad types of departments and agencies for which federal employees work?

A) federal departments,state departments,independent agencies,and independent regulatory commissions
B) departments,cabinets,independent agencies,and independent regulatory commissions
C) departments,administrations,independent agencies,and independent regulatory commissions
D) departments,independent stand-alone agencies,independent regulatory commissions,and government corporations