This is the name of the empire that ruled much of central Europe during the Middle Ages.
Term: Type term here

Holy Roman

Explanation:

Holy Roman Empire ruled over much of western and central Europe from the 9th century to the 19th century.

your answer is c

explanation:

john maynard keynes developed new economic theories in response to the stock market crash of 1929. great depression of the 1930s. first and second world wars. economic boom of the 1950s.