When the Organized Antislavery Movement in the United States Began

When the organized antislavery movement in the United States began in the late 1700s, what was meant by the concept of progressive elimination?

A) Progressive elimination was meant to give the freed slaves plenty of time to assimilate into society by gradually releasing them from property status.
B) Progressive elimination was the idea of a gradual abolition as opposed to outright abolition, considered to be a less confrontational and more rational approach.
C) Progressive elimination referred to outright abolition of slavery but only in one state at a time.
D) Progressive elimination meant a quick and decisive abolition of slavery, and was called "progressive" because it indicated an immediate step forward.
E) Progressive elimination meant that the states, due to their inability to eliminate slavery, would surrender sovereignty to the federal government in order to abolish slavery.