International Trade Improves Peoples' Standard of Living,yet Countries Often Put

Multiple Choice

International trade improves peoples' standard of living,yet countries often put up trade barriers? Why is this?

A) Goods that are imported compete with domestic products and put pressure on domestic businesses.
B) The quality of imported products is usually lower than the quality of domestically produced products.
C) Generating government revenue is often more economically valuable than free trade.
D) To keep a country's currency strong
E) International trade causes political tensions to develop.