Sovereign nation-states have the ability to complete all of the following activities EXCEPT: A. conduct day-to-day business
B. enter into agreements with other nations
C. set trade policies with other nations
D. freely invade other nations

I think that the answer of questions is option C

the labor movement in the united states grew out of the need to protect the common interest of workers

for those in the industrial sector organized labor unions fought for better wages reasonable hours and safer working conditions

  in the 19th century trade unionism was mainly a movement of skilled workers.

hope this