Why was the time period between the american revolution and the rectification of the constitution considered a "critical period" in the us?

The alleged “critical period” between the end of the Revolution and the rectification, for never has the United States been closer to succumbing to an American Caesar of the nationalists, made an end run around the Articles and called for a specialist.

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what are the options ?

the answer should be a. the sui empire, the tang empire extended from korea in the west to manchuria in the east.