Labor unions tried to get better working conditions for workers by A. promising to work longer hours.
B. setting up an apprentice system.
C. negotiating with employers.
D. promising to train workers.

C

Explanation:

union leaders threatened strikes among other things when negotiating with employers and politicians

yes ap politics. what do you need?

you will need these

an outline of all three paragraphsan identification of the historical era that you are writing aboutan explanation of the term mass productiona description of two ways new technology affected industrya conclusion that shows how new technologies allowed industrialization to grow