Answer:
steel industry
Explanation:
Andrew Carnegie went a long way in creating a monopoly in the steel industry when J.P. Morgan bought his steel company and melded it into U.S. Steel.
I believe the answer is a or the first one.
Nativism is the political position of preserving status for certain established inhabitants of a nation as compared to claims of newcomers or immigrants. It is characterized by opposition to immigration based on fears that the immigrants will distort or spoil existing cultural values.