What institution of the Roman Empire stayed strong and visible entering the Dark Ages?

After the fall of Rome, no single state or government united the people who lived on the European continent. Instead, the Catholic Church became the most powerful institution of the medieval period. Kings, queens and other leaders derived much of their power from their alliances with and protection of the Church.

Explanation:

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A B and C federalism gives states rights to pass laws and legislation to govern their citizens. It protects the right to vote and ensures the separation of powers between the federal government and state governments.