What was the purpose of the article of confederation?

Answer
The Articles of Confederation served as the written document that established the functions of the national government of the United States after it declared independence from Great Britain.
Explanation:
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Answer:
it is the Fourth one
Explanation:
the first choice is wrong as colonies became independent of britian and the word colonies may refer to both in us and the rest of countries around the globe
the second one is nearly accurate,but it is the purpose of deceleration of independence not articles of confedration
the third one isn't right as america doesn't act as judge to one of the most potent countries at this moment of time
the fourth one is only one that is remained
you can think in the name as confedration and fedral are synonymous