What this statement says about the Hooverville society is that Some Hoovervilles had basic public services and conveniences.
The second option is the correct answer here. The reason why it is the right option is the fact that the building is said to house a lot of things.
This tells us that the place was with facilities that were adequate for the people that lived there.
Only one building had the mayors, office, the grocery shop and the commissary. This shows that they had basic things.
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