In the late 1800s and early 1900s, violent riots were started in several Chinatowns by nativists who were angry and resentful of newcomers.
immigrants who were being denied their rights.
laborers who were unemployed.
city workers who were being denied their wages.

a punishment or the threat of punishment used to enforce conformity. enforcement of norms or shared rules of conduct that tell people how to act in specific situations. social control. not everyone internalizes all of society's norms, and some people must be motivated by self-fulfillment.

i think it's b or c hope this