The correct answer is B) Northwest Ordinance of 1787
What was the basis for the law that created Mississippi? The Northwest Ordinance of 1787.
The correct answer is the Northwest Ordinance also known as the Ordinance of 1787 because this legislation authorized the creation of a government for the territory called Northwest.
With this new legislation, the government established the process to admit new states to the Union in equal conditions and rights as the already states of the Union.
Years later, it was President James Madison the one who signed the enabling act to admit Mississippi as a new state of the Union. It was just for the western part of Mississippi. The date, March 1, 1817.