Respuesta :

Answer: The Kansas-Nebraska Act allowed each territory to decide the issue of slavery on the basis of popular sovereignty. Kansas with slavery would violate the Missouri Compromise, which had kept the Union from falling apart for the last thirty-four years. The long-standing compromise would have to be repealed.

Explanation:

Known as the Kansas-Nebraska Act, the controversial bill raised the possibility that slavery could be extended into territories where it had once been banned. Its passage intensified the bitter debate over slavery in the United States, which would later explode into the Civil War.