Both state governments and the federal government has the power to A. Negotiate treaties
B. Regulate interstate trade
C. Collect taxes
D. Issue state licenses

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the correct answer that would best complete the given statement above would be option b. expanding civil services. diocletian and constantine paved the way for foreign invasion by dividing the empire, creating administrative bureaucracies and reorganizing the military, except for expanding civil services. hope this answer .

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