The Implications of a "Global Economy" Are Important to the Field

The implications of a "global economy" are important to the field I-O psychology because

A) systems within a company that train,motivate,and reward employees need to be compatible with many different cultures.
B) the global economy is allowing countries to exist without economic connections to other countries.
C) the North American Free Trade Area (NAFTA) has put major restrictions on the movement of goods between countries.
D) the development of the European Union has made relocation more difficult for people trying to cross the borders of the former Soviet Union.