The correct answer should be World War 1. Basically, they believed that world war one came thanks to the tradition that was before it. They believed that no good things may come from that tradition so they wanted to separate themselves from it to avoid such monstrosities from ever happening again.
Clergy abuse caused people to distrust the Catholic Church As well as things such as indulgences aka buying forgiveness, and the Clergy doing what he tells people NOT to do, such as getting drunk, religious posts being sold, and misunderstanding the Sermon (a part of the Bible).
The Renaissance slowly enabled people to think of themselves as individuals, to have confidence in their capabilities, and to look forward to the fame their achievements might bring. The eyes of the Europeans were opened through the Crusades.
Among the choices provided above the country that last to join the allied fighting force is the United States who joined the fighting force in December 1941 after<span> the </span>Japanese attack on Pearl Harbor<span>. Thank you for posting your question. I hope it helps. </span>