Avoid forming political parts
Yes, the answer to this would be the third option. One of the causes of the rise of the conservative movements in the 1970s is the shifts in the demographics to the suburbs and Sunbelt. Conservative movements are actually rooted from American history. Hope this helps.
Because he was assassinated. He was assassinated very soon after the war ended and there was no time to do everything he wanted to do. Other people took over and started implementing reconstruction ideas and eventually it turned into more exploitation and segregation and racism.
B.) To work on the sugar plantations