Select the true statement$($s$).$

Group of answer choices

Sylves states the creation and maintenance of public emergency management agencies is a product of public policymaking.

Sylves states the passage of the Disaster Relief Act of $1950$ created the architecture of what would become modern U$.$S$.$ disaster assistance and emergency management.

The evolution of disaster policy across all levels of American government has helped create the field of emergency management.

Disaster management in the United States can be said to have roots in civil defense.

All of the above