South Carolina threatened to nullify which federal act?

the abolition of slavery

the expansion of the transportation infrastructure

the protective tariff on imported goods

the rotation in office that expelled several federal officers

the protective tariff on imported goods

Explanation:

This law was supposed to become effective during Andrew Jackson's time in the government. The law would diminish the tariffs to solve the problem created by the tariff applied in the 1828. States in the south didn't think it was enough, though. Specially South Carolina. Eventually, this culminated in the Nullification Crisis.