The answer is A
In the 1970´s most people worked in factories.
Most people in the United States worked as?
The correct answer is Option A. In the 1970´s most people worked in factories.
In 1790, Samuel Slater built the first factory in the United States based on a textile manufacturing secret brought in from England. He built a spinning mill in Pawtucket, Rhode Island, which soon underwent hydroelectric power generation. For the next decade, the textile industry was the country's dominant industry, spawning hundreds of companies.
The 1792 cotton gin contributed to one of the most important elements of the industrial era. He came up with the idea of making a weapon out of replaceable parts. The idea of replaceable parts appeared in Europe, but it took Americans time to successfully commercialize the concept.
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