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.
An unpleasant emotion caused by the belief that someone or something is dangerous, likely to cause pain, or a threat:
No one event was the actual cause of the revolution. It was, instead, a series of events that led to the war. Essentially, it all began as a disagreement over the way Great Britain treated the colonies versus the way the colonies felt they should be treated.
Americans felt they deserved all the rights of Englishmen. The British, on the other hand, felt that the colonies were created to be used in the way that best suited the crown and parliament. This conflict is embodied in one of the rallying cries of the American Revolution: No Taxation Without Representation.