Answer:The U.S Civil War started because the North wanted to abolish slavery. The South wanted to keep slavery. The Civil War started because the South didn't want to have slavery abolished. It didn't work out so well for the South because the North won and took over the South land.That is how the U.S Civil War started.
Explanation:i'm Sorry if wrong.
Both the Missouri Compromise and The Nullification Crisis of 1832 were two triggers (the first direct and the second indirect) for the American Civil War, as it faced states with slaves against the government of North (in the case of the Missouri Compromise), which attacked the southern economy, and manifested the sectionism between North and South. In the case of The Nullification Crisis of 1832, the North "attacked" North Carolina in terms of its tariffs, and manifested the weakness of the South, as opposed to the union of the North. Both events were the precursors of the Civil War of America.
At first, Confucianism is a religion. So we cross it out. Shihuangdi was the ruler of the Qin Dynasty, who expanded China around 220 BC. So I think it is A. ShIhuangdi<span />