The correct answer is: Only conclusion I follows.
The statement “No country is absolutely self-dependent these days” does not imply that it is impossible to grow and produce all that a country needs. It is possible that countries are not self-dependent because they choose to specialize in certain industries and trade with other countries for the goods and services they cannot produce themselves. It is also possible that countries are not self-dependent because they lack the resources to produce all that they need. However, the statement does not provide enough information to determine whether or not it is impossible to grow and produce all that a country needs.
The statement also does not imply that countrymen in general have become lazy. It is possible that countries are not self-dependent because they lack the resources to produce all that they need, or because they choose to specialize in certain industries and trade with other countries for the goods and services they cannot produce themselves. It is also possible that countries are not self-dependent because of government policies or other factors. However, the statement does not provide enough information to determine whether or not countrymen in general have become lazy.
Therefore, only conclusion I follows.