What does history reveal about Republics? A.
That they were all perfect and infinitely successful.

B.
That over time they all failed and became tyrannies.

That over time they all failed and became tyrannies

Explanation:

The republics were never perfect. And they  did fail a lot. George Washington even said himself, that he wishes they were more successful.

warfare was the primary means of cultural transmission in both regions.

d.

the northwest territory became the most densely populated area in the u.s.