As a Result of the Passage of the Kansas-Nebraska Act

As a result of the passage of the Kansas-Nebraska Act, _________________.

A) Northern states threatened to hold special state conventions for the purpose of declaring the act unconstitutional and thus null and void.
B) a coalition of Northern Democrats withdrew from the Democratic party and formed the American Party.
C) the Whig Party separated into Northern and Southern wings and was no longer able to operate as a national party.
D) Southerners became more convinced than ever that Congress had become the puppet of antislavery advocates.