Question

Which of the following enabled mass production in the 1920s?

a. standardization of spare parts
b. mass availability of electricity
c. introduction of the assembly line
d. new precision-manufacturing technologies

Answer 1

the answer is C i got it right

Answer 2

It was the "c. introduction of the assembly line" that enabled mass production in the 1920s, since this meant that products could be made with a division of labor.