Question

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(A) popular sovereignty superseded the Kansas-Nebraska Act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

Answer 1

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".