Staunch southern proponents of states’ rights believed that states had the right of nullification. Which of the following BEST definesnullification? A. secede from the Union if it seemed necessary B. refuse to enforce a federal law within state limitsC. dismiss members of the Supreme Court if they disagreed with theirrulingsD. call into question a presidential election result

B.

Explanation:

The doctrine of nullification was coined by Vice President of South Carolina, John C. Calhoun in 1828, by anonymously drafting a pamphlet titled 'South Carolina Exposition and Protest.'  

According to the doctrine of nullification, the states had the right to  null and void any of federal laws within state limits. In November, 1832, South Carolina adopted the Ordinances of Nullification making the tariff on imported goods null, void, and unconstitutional.

So, the best definition of nullification is in option B. Therefore, option B is correct.