The earliest civilizations developed in the river valleys of:
a) the nile river
b) the yellow river
c) the amazon river
d) the tigris and euphrates rivers

august 1585. hope this !

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