In the mid-1800s, why did most Northerners want the Kansas and Nebraska territories organized?
O to protect the institution of slavery
O to balance the number of free and slave states
to create more free states so they could control Congress
to provide farm land and extend the transcontinental railroad

to create more free states so they could control Congress

Explanation:

As we know, Northern states were more industrialized than the Southern ones, which were agricultural and needed slaves. That is why Northerners, who were against slavery wanted to create more free states to prevail in Congress. That is why later a new Kansas-Nebraska Act was brought by the Congress, according to which states were able to decide whether they want slavery or not.

to create more free states so they could control Congress

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