Which act, created by the US government in 1787, designated lands beyond the Appalachian Mountains, between British North America, with the Great Lakes to the North, Ohio River to the South, and the upper Mississippi River to the West for the United States to settle?

A) Land Ordinance of 1785
B) Judiciary Act of 1789
C) Embargo Act of 1807
D) Northwest Ordinance of 1787