12. the kansas-nebraska act nullified the missouri compromise bya. allowing slavery's spread to areas that had been free for more than 30 yearsb. abolishing slavery in slave states. c. lowing slavery in all states. d. ending slavery in agreed-upon slave territories.

Me! these questions are based on american people in the south essential questions: question 1: for what reasons will one group of people exploit another?focus questions: question 1: what influenced the development of the south more: geography, economy, or slavery?question 2: what were the economic, political and social arguments for and againsts slavery in the first half of the 19th century.