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.

the answer is b: the religion they practice.

here's why:

there were many different native american tribes and those with similar characteristics formed a main tribe or nation. each had its own language, religion and customs.

depending on what kind of map for example a pltical maps works in many ways this iss how it works it shows the areas and places the democratics and the repbulcicans reside for example if   texas chooses trump for president there a republican state and if   califronia chooses hillary there a democratic state.