The right answer is a.Nations became more self-sufficient.
Industrialization consists of transforming a certain geographic space from the construction of industries and companies directly and indirectly linked to these industries. This human phenomenon is important because it causes profound socio-spatial changes, both by accelerating urbanization and rural exodus, and by drastically altering the way of exploitation and use of natural resources. This also allows for greater economic and geopolitical independence of the country. Increasing growth in an accelerated way due to the great supply of jobs and the mechanization of the field, for example.
