"It is the true intent and meaning of this act not to legislate slavery into any State or territory or to exclude it there from, but to leave the people thereof perfectly free to form and regulate their domestic institutions in their own way, subject only to the Federal Constitution."
Who said this and what idea does it express?
A. Stephen Douglas on popular sovereignty
B. John C. Calhoun on states' rights.
C. Abraham Lincoln on forming a more perfect Union.
D. Henry Clay on the need for compromise.