I think it would be the failure to pass treaties. European nations are often in conflict over land territories and vast riches of the country. Another reason why the European countries always care in conflict, it would be religion. Many of them are firm believers Christianity. I think this was the reason why there was Crusades occur.
Radical republicans in congress but I’m not sure
B. A proposed law being considered by Congress
I think a and b idk I'm looking for this question too but those two would be my best guess
