An economic theory in international trade that is based on the assumption that there are only two countries trading two goods
a. is useless, since the real world has many countries trading many goods.
b. can be useful only in situations involving two countries and two goods
c. can be useful in the classroom but is useless in the real world
d. can be useful in economists understand the complex world of international trade involving many countries and many goods

The correct answer is option D.

Explanation:

An economic theory regarding international trade is based on two countries model. Though this is not applicable to real-world situations, as it involves only two countries and two goods. But it is helpful in understanding the complex real-world situations of international trade involving many countries and many goods.  

If we use real-world situations to understand world trade it will be too complex to understand.

the correct answer is - no.

winnipeg, canada, is not further away from the equator than moscow, russia, in fact moscow is the city that is further away from the equator. moscow is on a latitude of 55.7558° north, while winnipeg is on a latitude of 49.8951° north, thus putting moscow by 5.8607° further away from the equator than winnipeg is.

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