In the late 1800’s and early 1900’s, several chinatowns had violent riots that were started by: a) workers who were unemployed b) city workers who were not being paid c) immigrants who were denied rights

The correct answer is A - Nativists who were angry and resentful of newcomers. This is because at that time, the original American workers were losing jobs to immigrants who were ready and willing to work for a fraction of the original workers, for longer periods of time. 

Hope this helped, and have a nice day!

P.S. You can rate brainiest if you'd like :)

Explanation:

A

bismarck believed in using force

is the correct answer!