Answer:
A lot of people from other countries immigrated to USA.
Explanation:
The standard of living is improved through something called "comparative advantages", which means that, relative to the nations' total output and ability to make other things, each nation produces something that they're better at making than the other. When the nations trade, they are able to use these comparative advantages to create a more efficient, productive economy.
Even if one nation is wealthier or better off than the other, this principle means that both countries can still become better off through trade.
Correct answer choice is:
A.United Mine Workers
Explanation:
The United Mineworkers of America may be an organization that began in 1890 by characterizing the requirements of miners, and alternative staff, inside the mines. The union used negotiation as a tool to attain its goals and enforced strikes once necessary. The first efforts of the United Mineworkers were to enlighten spiritually the matter of active metabolic process diseases within the coal fields.