The Creation of the U

The creation of the U.S. Northern Command was important because it

A) ultimately led to the creation of the Department of Homeland Security.
B) unified, for the first time in American history, the Air Force, the Navy Department, and the War Department.
C) breached the long-standing line between domestic law enforcement and foreign military operations for the first time.
D) was the first time the Department of Defense had taken such an action without congressional approval.