What did the south carolina ordinance of nullification declare? a. the tariffs of 1828 and 1832 were unconstitutional. b. the supreme court had declared the tariffs of 1828 and 1832 unconstitutional. c. trade was exclusively a state power. d. the tariffs of 1828 and 1832 were null and void. e. enforcement of the tariffs of 1828 and 1832 was grounds for secession.