Very sure the answer is D
Well Europeans have always been of huge followers of christianity. When Europe was going through their rough times of the black death and smallpox, many did reach to there faith in search of an answer. When they discovered what muslims where doing, because Muslims are big on spreading your faith as much as they can, so when Europeans and Muslims crossed paths, the Europeans did not like that there was another big realign and society interfering with there. I believe it was more of a pride thing.
The correct answer to this open question is the following.
The United States already lived in a difficult situation regarding the possibility of a big division when Abraham Lincoln became the President of the United States in 1860.
Southern governmental leaders convinced themselves that the arrival of Lincoln would make things worse for their economic and political interests. Few things were really available to try to impede secession and not confronting the country. The Dred Scott decision complicated more the differences that existed in the Democratic Party.
President Lincoln was very clear in his political decisions and the southern states' leaders were sure that the best and next step, would be secession. And those ideas were so ingrained in both sides -North and South- that really nothing else could be done at that time to impede the inevitable.
