If Movement of Labor Across Countries Is Costless and Painless

Multiple Choice

If movement of labor across countries is costless and painless, it can be expected that:

A) all the countries in the world will operate at the full employment level.
B) the wage rates in the countries will equalize over time.
C) the rate of unemployment will fall to zero in all the countries.
D) the GDP of the countries will equalize over time.