Which region of the united states had the greatest proportion of urban dwellers?

I'd say the Western part of America. Think of every major city. When I think of some, I think of LA, San Diego, San Francisco, Seattle, Las Vegas, Portland. There are more too. For the east, I can really only think of DC, New York, maybe Atlanta. So for sure, I'd say the western region of America. 

The answer is a)advocates of divine right.

The air will be way different