It created the process for admitting states and expanding the country.
Option: (C)
<u>Explanation:</u>
The northwest ordinance is considered as one of the important laws in American history because of the fact that it describes how a state would be admitted.
Moreover, it also clearly defines the areas like how a newly admitted state would get its equal status in the union and how the civil liberties and equity would be provided to those states.
Due to this law, the expansion of the country was well defined and a systemic and legal process was set for this process.