Answer:
The nativists use "scientific ideas" C: To try to prove that whites were the strongest race
Explanation:
Nativists are the people who belong to that country. Immigrants travel from a different country to settle in another country for better jobs and lead better life. They always beloved themselves to be superior to the immigrants. They said that immigrants could never fit into American culture, languages and religions. And if they come to America, they would destroy the country.
Nativists argued scientifically that there are few races who are weaker than others and the whites is the strongest race. So, they should be treated in a better way as compared to others.