Assume that initially country A exchanges three barrels of oil for one ton of steel from country B. Later the arrangement changes to four barrels of oil for one ton of steel. This indicates that:

Group of answer choices

country A has a comparative advantage in the production of steel.

the terms of trade for country B have improved.

the terms of trade for country A have improved.

the relative price of steel in terms of oil has fallen.

country B has an absolute advantage in the production of oil.