Correct answer choice is :
C) Were hired to tend to machines and were paid less than skilled workers.
Step-by-step explanation:
Mass production, also identified as flow production or constant production, is the production of large quantities of regulated products, including and primarily on construction lines. Manufacture of goods in large numbers by regulating parts, methods, and machinery. American inventor Eli Whitney began mass production in 1798 to produce weapons. The assembly line, a conveyor belt taking the work through a set of assembly areas, was launched in 1913 by Henry Ford.