What does "DHS" stand for?

The acronym "DHS" stands for the Department of Homeland Security. This department is a critical part of the United States government that was established in response to the events of September 11, 2001, with the primary aim of ensuring national security and protecting the country from various threats, including terrorism, natural disasters, and other emergencies.

DHS encompasses several agencies and initiatives aimed at safeguarding the United States and managing immigration policies, among other functions. This aligns directly with the work of USCIS (United States Citizenship and Immigration Services) and other components of DHS that handle issues related to immigration, asylum applications, and refugee protections, making it especially relevant within the context of the AOBTC.

The other agencies listed in the options serve different functions that do not pertain directly to national security or immigration, highlighting why "Department of Homeland Security" is the correct and most appropriate interpretation of "DHS" in this context.