The correct answer is - C. both A and B.
Big portion of the rural Mexican population is poor and lives in terrible conditions, often being forced to work for the local mobs, and being paid little to nothing.
In search of better life, big portion of the rural population in Mexico is migrating towards the United States, more often than not illegally. In general, it is the men that migrate, while the women and children stay at home. The men send money to them while working in the United States, in order to be able to survive. Because of this trend, lot of Mexican villages are lacking men that are in their working-age.
