Answer: B. Primarily conducted by federal agencies with homeland security missions.
In the US, certain agencies are given the task of running all aspects of the operations of homeland security. the department of homeland security is tasked with protecting the country from any form of attack which can emanate from within. This could range from border security to a breach in immigration law among numerous other fronts. Homeland security is made up of multiple agencies which include the FBI(federal bureau of investigation) which focuses on counter-terrorism, FEMA which focuses on quick responses to emergencies in the country, among other numerous agencies all contributing to the functionality of the homeland security