The correct statement is:
Ecuador can produce bananas at a lower opportunity cost than the United States.
This statement is true because having a comparative advantage means that Ecuador can produce bananas more efficiently relative to other goods compared to the United States. The other statements are not necessarily true:
- "Ecuador also has an absolute advantage in the production of bananas": This is not guaranteed; absolute advantage refers to the ability to produce more of a good with the same resources, which is not implied by comparative advantage alone.
- "The United States cannot produce bananas": This is false; the United States can produce bananas, albeit perhaps at a higher opportunity cost.
- "The United States has an absolute advantage in the production of bananas": This is also not necessarily true; it depends on the specific production capabilities and resources available in each country.