Vernon Theorizes That as the Market in the United States

Vernon theorizes that as the market in the United States and other advanced nations matures

A) it necessitates exports from the United States to those countries.
B) it is no longer worthwhile for foreign producers to produce for their home markets.
C) it obviates the need to look for low-cost production sites in other countries.
D) the product becomes more standardized,and price becomes the main competitive weapon.
E) the resources used in production begin to become scarce.