Answer: D. Unity of effort
In the absence of a formal command structure, ETFs are required to build consensus to achieve unity of effort.
Explanation: The Joint Task Force (JTF) is a coalition of police officers, firefighters, civil volunteers, and army national guardsmen formed in the aftermath of the "Dollar Flu" outbreak on Black Friday in New York City.
The Joint Task Force (JTF) is the primary organization for joint operations. The JTF organizational structure capitalizes on the unique capabilities of each Service and provides the flexibility to tailor the size and makeup of a military force to accomplish specific tasks in either peace, crisis, or war.