All of the following cases involve due process EXCEPT... O Gideon v. Wainwright
O McCulloch v. Maryland
O Miranda v. Arizona
O New Jersey v. T. L.O.

C because that is what I think it is

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.