Answer:
The correct answer is A.
Explanation:
This sentence is correctly punctuated because it separates the initial adverbial clause with a comma, and then puts another comma before the conjuncting adverb "while," which is correctly used joining two sentences.
Into many kingdoms
After the fall of Roman empire, Germanic people spread all over europe and established small kingdom that ruled over the fragment of what used to be Roman's territory.
They defined the rules that they imposed to these territories as the 'barbarian law'