The Olmec civilization was located in Mesoamerica, in a region that is now occupied mainly by Mexico. They were a very early civilization that came to prominence around the same time as Mesoamerica was flourishing.
i think it is: C) Individual states have rights that the federal government cannot violate
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