The correct response is:
The federal government did not enforce the Fugitive Slave Law of 1793.
Southerners felt that the federal government was not protecting their interests, particularly regarding the enforcement of laws they believed were crucial to maintaining the institution of slavery. The Fugitive Slave Law was intended to help slave owners retrieve escaped slaves, and when it was not adequately enforced, many southerners viewed that as a failure of the federal government to uphold their rights and interests.