1: was the mexican cession
2: was the land in the west
states' rights and slavery is the correct answer.
Just took this quiz and the answer is A) Becausr the state wanted to get rid of slavery and wanted them to have right and that they wasnt the owner property and they were gods property. A. a big part of this was the mexican cession and other new land out west. many in the north wanted to make all of this free, while most in the south wanted it to be decided by popular sovereignty. the south felt like their rights were being violated by the north wanting to suppress this institution they have. the other answer choices are included under the slavery and states rights choice, because new land had to do with slavery. So with all this information your answer is A.
Please mark brainlest
The South succeeded because of the unfairness of the government.