European Imperialism was a period of colonial expansion. It is the most important cause of WW1 because it built tension between the countries. It caused Tension between Nations and Countries. Was a cause of WW1 by separating from where they stand to form another empire away from their old empire, to avoid dictatorship.
ANSWER: B(henry clay)
Hope it helps if so lmk
Answer:
sorry am not really sure could you please give more detail?
Explanation:
Cities developed professional firefighting and police forces.
