__________ is a military command which has a broad, continuing mission under a single commander, and which is composed of components from two or more U.S. services.

• A. Unified Combatant Command
• B. Joint Task Force
• C. Air Operations Center
• D. National Security Council

Answer: (A)

Unified Combatant Command is a military command with a broad, continuing mission under a single commander and composed of components from two or more U.S. services. These commands are designed for unified planning and execution across multiple services, often spanning a geographic region or a major functional area, and they operate on an enduring mandate under one commander.

A Joint Task Force, by contrast, is typically formed to accomplish a specific operation or limited objective for a limited time, and while it can include forces from more than one service, its existence and purpose are not meant to be permanent.

An Air Operations Center is a primary air force command and control hub for planning and conducting air campaigns; it is service-specific rather than a standing, multi-service command with a continuing mission.

The National Security Council is a policy coordination body, not a military command that oversees forces in the field.

So the description best matches a Unified Combatant Command.