Why Does It Make Sense to Trade with Other Nations

Multiple Choice

Why does it make sense to trade with other nations?

A) After producing all the product and service its people want and need, a nation can sell the excess products to the world.
B) Some nations have lots of natural resources and technological know-how. They have an ethical obligation to offer the rest to other nations.
C) Other nations need foreign currency.
D) A nation will produce what it can produce most efficiently and effectively and buy from other nations what they can produce most efficiently and effectively.