The key is national health
Answer:
it has established itself as an economic power.
A) Der Fuhrer
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The creation of interchangeable parts greatly changes the labor force during the 1800's. Interchangeable parts allows for a standard size of goods (clothes, furniture, etc.). Due to this change, the workforce transformed from a demand for skilled workers to unskilled workers. With interchangeable parts, there was no longer a need for individuals to make everything from hand. Instead, businesses were able to mass produce products with the help of unskilled workers. These workers were usually taught a specific, repeatable task. As long as the unskilled worker was able to learn this task, they would be able to keep their job. This revolutionizes the workforce for over 100 years, as the addition of the assembly line along with interchangeable parts results in the creation of products at a rate never seen before in world history.
a. rose
The quality of life of the Americans has improved because of the Great Society introduced by President Lyndon B. Johnson in 1964. It aims to put an end to poverty and racial injustice. High school graduation rates also rose following the implementation of several Great Society programs.
The involvement of the United States in the Vietnam war eliminated some of its programs, but others like Medicare, Medicaid, the Older Americans Act and federal education funding, remained.