Slavery was abolished on december 6, 1865. what process was used to abolish slavery?

a: it was stated in the bill of rights.
b: each state passed a freedom law.
c: each state passed a civil rights bill.
d: a constitutional amendment was passed.

23. how does specialization among nations encourage interdependence? nations work together to share labor and resources to produce vital goods. nations sign treaties prohibiting taxes on imports. nations produce specific goods and then trade to obtain things they need. nations that are more developed agree to fund development in nations with limited industry.