The best answer is A. Violent riots were started in several Chinatowns by nativists who were angry and resentful of newcomers. Nativists believes in focusing in the protection of the interests of the native people or the original inhabitants in an area. They are always against newcomers or immigrants.
There are five main causes to the civil war, Slavery, Economy, Federal versus State rights, Abraham Lincoln becoming president and the Battle of Fort Sumter.
