What did nativists believe?

O

A. Immigrants would destroy America.

O

B. All immigrants should join unions.

O

C. All immigrants should become citizens.

O

D. Immigrants should have the right to own land.

A, immigrants would destroy America

Explanation:

While most nativists have a less extreme version of that position, that is the nativist belief at its core. Nativism is all about protecting the interests of Americans (or the natural born citizens of whatever nation in question) over the interests of everyone else, including immigrants and other nations, often including allied nations. It is a sort of anti-globalist/isolationist politics.