Answer :
b. Immigrants work cheaply, which steals jobs from U.S. citizens and lowers wages for all.
The correct answer is B.
Nativism is a political tendency which highlights the need of preserving the rights of the native inhabitants of a terrority over those of immigrants. It fosters the implementation of policies for restricting inmigration flows.
One of the most widely used arguments to gather more support is exactly the one contained in option B, stating that immigrants steal jobs from nationals.