The Central Reason Why There Are Gains from International Trade

Multiple Choice

The central reason why there are gains from international trade is because

A) ​trading allows otherwise unemployed people to have jobs.
B) ​the rate of interest is not the same in all countries.
C) ​resources are not equally distributed to all nations.
D) ​those nations with absolute advantages in producing many goods can produce all of those goods at lower opportunity costs than other countries.