<h2>D. They feared factories would close if immigrant populations declined.</h2>
Explanation:
<em>This scenario is the most probably between these options, because immigrants represent a lower wage work force, such that they can acquire jobs that could be able to native people.</em>
We need to consider that nativism is a political policy which defend native people agains immigrants, supporting immigration restrictions measures. The main reason, according to books and articles, is that nativist fear that their culture could be changed because of the great number of immigrants. But, the reasons are plenty: social, cultural and economical.
Carter wanted to drop the atomic bomb on China when North Korea tried taking over the south of Korea. The u.S got involved in the war and pushed North Korea all the way to China