Which of the following describes nullification

Nullify means to quiet down, or silence,so we can infer that the word nullification is made of nullif witch is a greek or latin Root. So nullification decrides the states'-rights doctrine that a state can refuse to recognize or to enforce a federal law passed by the United States Congress.

Um well north korea is a very harsh place because students go to school for 24 hours and almost never rest and the president is well i think sends to much bomb that’s what i think