The Freeport Doctrine Might Be Defined as the Concept That

The Freeport Doctrine might be defined as the concept that:

A) slavery could not be prohibited in a territory until that territory became a state
B) slavery was immoral and ought to be abolished in all territories of the United States
C) whatever the Supreme Court said about slavery, it could not exist anywhere unless supported by local police regulations
D) if blacks were freed from slavery, they must be given full legal and social equality
E) the Dred Scott decision should be overturned