In the late 1700s, the passage of the Northwest Ordinance allowed for the organization of territories and the admission of states.
expansion of the United States to twice its size.
exploration and establishment of the Oregon Trail.
protection against attacks by American Indian tribes.

A. The organization of territories and the admission of states.

Explanation:

the precambrian aged rocks could be found in australia. australia is a region that has a lot of ancient civilization history from million years ago. in this region, there are a lot of recognizable fossils buried in its land which is considered a precambrian-aged rocks