Which Was NOT a Change in the Economic and Political

Multiple Choice

Which was NOT a change in the economic and political philosophies that drove the globalization boom causing U.S.imports and exports to rise from $47 billion in 1960,to $562 billion in 1980,to about $4.7 trillion recently?

A) government dropped cross-border taxes or tariffs
B) economic free trades areas were formed
C) steps were taken to encourage free flow of trade among countries
D) instability in the world labor market