The term "Braceros" mostly describes "immigrants from Mexico who had contracts to work in America, mostly in agriculture" The term comes from the Spanish<em> "Brazos" (Arms) </em>and it makes reference to the fact that Mexicans work mainly with their when involved in agricultural work.
It is necessary to mention that not all <em>"Braceros"</em> have contracts to work, a lot of them just cross the border as <em>" Mojados" -because they cross the Bravo River as illegal inmigrants and get wet, therfore the term Mojado (wet).</em>
C and D maybe A but I'm not that sure
With the collapse of the Soviet Union in 1989 and the end of the Cold War in 1991, the world became more interconnected. This is because the communist bloc countries, which had previously been intentionally isolated from the capitalist West, began to integrate into the global market economy.
I think it was the Phillipines
The answer would be c. labor brought about by large-scale mining operations