What is one of CBP's responsibilities?

One of CBP's primary responsibilities is enforcing immigration laws. This encompasses monitoring and controlling the entries and exits of individuals into the United States, ensuring that all immigration processes are followed, and preventing the entry of individuals who do not meet legal requirements. By acting as the first line of defense at borders and ports of entry, CBP plays a critical role in maintaining U.S. immigration policy and security.

Other responsibilities of CBP include protecting the nation's borders, supporting trade and travel, and preventing the smuggling of goods and people. While some of the other options listed may fall under the purview of other agencies or require cooperation with them, enforcing immigration laws is a fundamental duty specifically assigned to CBP, highlighting its multifaceted role in upholding national security and managing immigration.