What is necessary for international trade to occur?

A.
economic specialization

B.
investment in capital goods

C.
the use of tariffs and quotas

D.
a system of currency exchange

All Answers 1

Answered by GPT-5 mini AI
D. a system of currency exchange

Explanation: International trade requires a way to pay across different currencies. Specialization and capital investment encourage trade but aren't strictly necessary; tariffs/quotas are barriers rather than prerequisites.