Which new developments in the factory system of the 1920s helped businesses produce more items at lower costs? Select three options.assembly linedivision of laborinterchangeable partsincreased consumerismgrowth of the middle class

The assembly line moved products through a sequence of tasks, while division of labor let workers specialize in particular tasks. Interchangeable parts made products easier to assemble and repair because the same parts fit in multiple units. Together, these factory methods increased production efficiency and lowered costs; increased consumerism and a larger middle class were related to economic growth, not factory production methods.

AI-written and checked against the verified answer.