Answer:
Option C.
Step-by-step explanation:
An agency that is not part of any Cabinet department, is the right answer.
Those agencies of the federal government of the United States that exist outside the national executive departments (those supervised by a Cabinet administrator) and President's Executive Office, are known as the Independent agencies. In simple terms, this is a term used to describe those agencies that while legally portion of the executive branch, are autonomous of presidential authority, usually because the power of the president to remove the agency leader or a member is restricted.