Why do nations establish trade barriers? a. trade barriers promote equality among nations, ensuring that everyone produces similar products. b. trade barriers eliminate sanctions and embargoes between nations. c. trade barriers limit the movement of people from one nation to another. d. trade barriers protect a nation's interests by encouraging the production of homeland goods.

D.Trade barriers protect a nation's interests by encouraging the production of homeland goods.

The most common example of a trade barrier is the tariff. It put tax on imports which increases the price of imported goods compared to goods produced locally. Due to the increase in the price of imported goods, demand for local goods will increase encouraging production of homeland goods.

the answer is D

Explanation: