​According to the Text, International Trade (Exports Plus Imports Combined)

​According to the text, international trade (exports plus imports combined) as a percentage of GDP is:

A) ​higher in the United States than in European countries.
B) ​lower in the United States than in European countries.
C) ​higher in the United States than in about half the European countries, and lower in the United States than in the others.
D) ​about the same in the United States as in European countries.