Wilhelm wundt used the method of introspection to study people's perceptual experiences. his method was later replaced by the more objective method of:

Ithink the answer is d. the lower appellate and trial courts in the state. 

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.