What is the definition of a microregion according to the text? I- An agglomeration of neighboring municipalities that assumes a prominent national...

What is the definition of a microregion according to the text?

I- An agglomeration of neighboring municipalities that assumes a prominent national expression due to high population density, significant conurbation, and urban and regional functions with a high degree of diversity, specialization, and socio-economic integration, requiring integrated planning and permanent joint action of the public entities operating in it.
II- An agglomeration of neighboring municipalities that presents a functional integration relationship of an economic-social nature and continuous urbanization between two or more municipalities or shows a tendency in this direction, which requires integrated planning and recommends coordinated action by the public entities operating in it.
III- An agglomeration of neighboring municipalities that presents functional interaction relationships of a physical-territorial, economic-social, and administrative nature, requiring integrated planning to create adequate conditions for regional development and integration.
a) Only I is correct.
b) Only II is correct.
c) Only III is correct.
d) I and III are correct.