What does David Autor mean by the "polarization of the labor market"? Group of answer choices (B) expanding opportunities for high-wage, high-skilled occupations and low-skilled, low-wage occupations (A) and (C) (C) expanding opportunities for medium-wage, medium skilled occupations (A) contracting opportunities for high-wage, high-skilled occupations and low-skilled, low-wage occupations (B) and (C)