Hey, it's b because slavery was the main thing that supported the South's economy - hope this helps :)
The first and the last indicate it's a reliable source.
The answer is england..... your welcome
They became sedentary. they started to use agriculture to create a surplus of food and as the need for farmers decreased; different duties emerged and that led to the formation if civilizations.
Answer:
It all started because the Soviet Union (USSR) began building missile sites in Cuba in 1962. Together with the earlier Berlin Blockade, this crisis is seen as one of the most important confrontations of the Cold War. It may have been the moment when the Cold War came closest to a nuclear war. Yeah :)
