Answer:
A)both countries would gain if Botswana traded wheat grown in Botswana for Qatar's wine.
Step-by-step explanation:
The law of comparative advantage can be regarded as one set up by David Ricardo in the year 1817, which gives reason that is behind international trade that exist between different countries , even the business, workers as well as factories of a country have efficiency at production of every single good compare to other country.
Comparative advantage shows the ability of an economy have in production of a particular good/ service having lower opportunity cost compare to its trading partners.