The correct answer is D.
Nativism is a political stream that promotes the interests and rights of national population over immigrants. It supports the establishment of measures to control (to block) immigration flows. This stream constituted the ideological base for the enactment of the Chinese Exclusion Act in 1882, which established quotas to control the arrival of Chinese immigrants to the US.
Such feelings against imigration are justified by nativists because of the amount of money that they cost to the public agencies, because they steal jobs that should pertain to domestic citizens, or because they are condenmed to isolation because they do not know the language or customs of their new home country.