Over the Past Several Years, the Earnings Gap Between High-Skilled

Over the past several years, the earnings gap between high-skilled and low-skilled workers has widened because
(i) international trade has altered the relative demand for skilled and unskilled labor.
(ii) changes in technology have altered the relative demand for skilled and unskilled labor.
(iii) the return to education for men has decreased, whereas the return to education for women has increased.

A) (i) only
B) (iii) only
C) (i) and (ii) only
D) (i) , (ii) , and (iii)

Correct Answer:

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