A Comparison of Wages in the U

A comparison of wages in the U.S.and in less developed countries shows that:

A) high-wage U.S.labor cannot compete with low-wage labor in many developing countries.
B) workers in the U.S.are more productive than workers in less developed countries.
C) the substitution of labor for capital depresses wages and increases unemployment.
D) the supply of labor in developed countries had increased faster than demand.