What is one problem that can occur when a country tries to create a self- sufficient economy?
A. It becomes too dependent on voluntary exchange with other
countries.
O B. It pays high opportunity costs for goods it does not specialize in
producing.
C. It creates a division of labor that forces workers to specialize in
certain skills.
O D. It reduces the total economic value of its human and physical
capital.

B. It pays high opportunity costs for goods it does not specialize in  producing.

Explanation:

Due to the presence of different resources as well as other socio-economic factors that are present in the different nations of the world, there are goods and services that are more suitable to the produced in one country than in another.

If a country that is not suitable to produce a good starts doing so, it will incur high opportunity costs because they would be sacrificing the resources they have to produce the less suitable good when they could use less resources to produce more of the goods they are more suited to.

A country that plans to go self sufficient may find that there are some goods that they need that they are not suitable to produce. To produce it therefore, they will incur high opportunity costs because they simply do not specialize in its production.