Third option: Most people live in large urban areas
MERCOSUR is an abbreviation of "Mercado Comun del Sur": common market of the South America: most of the eastern South American coutries are members of this common market.
It's a trade block of countries in South America which promotes free trade and free movement of people.
an employer’s needs
a worker’s qualifications and productivity
The current state of the labor market
negotiations between an employer and worker
