Question

in the 1920s, how did manufacturers make products faster and more cheaply?
they reused old designs and models.
they offered a smaller range of goods.
they saved on costs by not advertising as much.
they adopted henry fords manufacturing techniques.

Explanation:

In the 1920s, Henry Ford's assembly line manufacturing technique revolutionized production by standardizing processes, allowing for mass production that was faster and reduced per-unit costs. Other options do not align with the key innovation that drove faster, cheaper manufacturing in this era: reusing old designs did not boost speed/efficiency at scale, a smaller goods range was not the core method, and reducing advertising does not improve production speed or cost efficiency.

Answer:

D. They adopted Henry Ford's manufacturing techniques.