DCIS is an acronym for which investigative service?

The correct answer is that DCIS stands for the Defense Criminal Investigative Service. This agency is primarily focused on investigating criminal activities related to the Department of Defense (DoD) and its components. The service plays a critical role in protecting military personnel and assets from fraud, corruption, and other criminal threats.

This answer is correct because it specifically identifies the function and jurisdiction of the agency, which is dedicated to enforcing laws and regulations within the defense sector.

The other options do not correspond to recognized investigative services. While they may seem plausible, they do not represent established entities within the realm of criminal investigations, especially in relation to national defense. Understanding the accurate designation of such agencies is essential for those involved in law enforcement and national security areas.