Define clergy from the medieval times

They were the members in the Catholic church that held all the power. Since society was based off of the christianity they were also involved in politics. They also were the only ones educated (excluding nobility and royals) in the Medieval times. The ranks from highest to lowest is pope, bishops, priests, monks and nuns. 

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Um well north korea is a very harsh place because students go to school for 24 hours and almost never rest and the president is well i think sends to much bomb that’s what i think