Which economic change can be attributed to the development of new technologies in the 1920s? a The number of bootleggers increased. b People began earning middle-class salaries. c Production and manufacturing became more efficient. d Consumers saved money and bought expensive inventions.

C

Explanation:

Factory system was created, making production much faster.

Option C. Production and manufacturing became more efficient.

Explanation:

the answer is c     : )

explanation:

i don't have an explanation because i don't know, but i think the answer is c because i googled it and google is right : ) just kidding google isn't allways right but the answer is still c. i hope this !