The correct answer is a system of manufacturing that uses machines to rapidly produce large amounts of a product.
Mass production became an important part of American society during the Gilded Age. The Gilded Age took place after the era of Reconstruction (1877-early 1900's). This era saw America emerge as a highly industrialized nation that focused on different methods that can be used to make as many products as possible. This demand for goods resulted in the development of innovations like the assembly line. These factors helped cause the rise of mass production of goods in the United States, which still continues today.
