The Freeport Doctrine stipulated that
(A) popular sovereignty superseded the Kansas-Nebraska Act
(B) the Dred Scott decision voided the notion of popular sovereignty
(C) slavery could be prevented by states passing laws unfriendly toward
the practice
(D) the Kansas-Nebraska Act was unconstitutional under the Dred Scott
decision
(E) the Fugitive Slave Act was unconstitutional in territories gained from
Mexico
In general, the Freeport Doctrine stipulated that "(C) slavery could be prevented by states passing laws unfriendly toward the practice," since it held that this would cause slavery to eventually "die out".
