The correct option is A
The Ordinance for the Government of the Territory of the United States, Northwest of the Ohio River known as the Northwest Ordinance or the Freedom Ordinance was a law of the Congress of the United States Confederation. The ordinance was approved unanimously on July 13, 1787. The main effect of the ordinance was the creation of the Northwest Territory as the first organized territory of the United States of the region south of the Great Lakes north and west of the River Ohio, and east of the Mississippi River. On August 7, 1789, the Congress of the United States affirmed the Ordinance with slight changes established by the Constitution.
