The missouri compromise established which as a precedent? a adding slave and free states equally to keep the balance of power. b using popular sovereignty as the deciding factor on the legality of slavery. c promoting the expansion of slavery to support the south. d applying its compromise decision to all territories and future states.

The answer is A. Adding slave and free states equally to keep the balance of power.

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one of the main reasons was definitely slavery. back in 1861, republican abraham lincoln was elected and ended up being a major influence in the slavery business. slavery greatly affected the texas economy because back in 1845 during the annexation of texas, slaves became a big part of the texas population. many texans that were in favor of the secession influenced groups through party ties.