I am working on a directory-like website for a specific profession.
Currently, the directory URLs are like that:
Option A -> URL/country/district/sub-district/town
It is nice and easy to remember but it may too deep for SEO.
Another option could be:
Option B -> URL/country_district_sub-district_town/
Less nice looking, but stay close to root directory
Lastly, I was also thinking to have this option
Option C -> URL/town/
Option C -> URL/country/
Very easy to remember, but a town can have many matches (like same town but in two different sub-districts)
What would be the best option between A, B and C for Google optimisation with Adsense use?