The Confederate troops first fired at Fort Sumter in South Carolina. Less than 34 hours later, the union forces had to surrender to them. The reason this firing occurred, was over the debate on slavery. Sectionalism and secession also played part in beginning the civil war.
I believe the answer would be C due to the fact that it touches on different reasons in the paragraph and doesn't speak on only 1 reason of marriage <span />
Rome ruled the western world for about 1000 years
The imrpoved agricultural techniques, such as the three field system, the climate change, and the horse plows. These effected Western Europe during the middle ages because the three field system produced better crops, the climate opened more land to farming, and the horse plows allowed faster harvesting. This made life a lot easier for farmers.