In american cities, played the largest role in allowing many residents to have the freedom to live farther away from their jobs. a. flight networks b. automobiles c. central business districts d. streetcars

Automobiles because it was able to provide faster transpertation to get somewhere.

B.Automobiles your welcome

An informal structure in a bureaucracy would be something like so-called "office politics". where there's a formal structure set up for the organization, but then an informal subculture as well that has a way of organizing the bureaucracy further. this can be positive because it sets up an added degree of organization, albeit informal, within the bureaucracy.