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 correct answer would be A :)
The Treaty of Versailles caused long-term instability in Europe (and parts of Asia) by ignoring the nations who had lost WWI. The treaty didn't provide any support for the nations who had lost, creating resentment in the hearts' of their people. This disunity allowed for the rise of facist dictators post-WWI, eventually causing World War II.