Answer:
Option C, D and E
Step-by-step explanation:
Mass production was incorporated in factories after the industrial revolution marked by the invention of machineries.
These new machineries were capable of producing products at a much faster rate and much higher volume in a short period of time.
There was demand of skilled workers who can handle the new machineries.
And also minimal activities were carried out by hand.
Hence, option C, D, and E are correct