Which of the Following Statements About the International Trade in Healthcare

Which of the following statements about the international trade in healthcare is true?

A) The European Union is the only international group in which citizens travel freely from one country's health care system to another.
B) Licensure and immigration laws restrict the flow of health care service workers among countries.
C) Enforcement of international patent laws means that price discrimination does not occur in the international pharmaceutical market.
D) It is much more likely for the German government to allow work permits for nurses from less developed countries than it is for the U.S. government to allow work permits for nurses from less developed countries.
E) The largest component of the international trade in medical goods and services is trade in medical services.