When was the US constitution written?

answer; /// i believe that the correct answer is (a) making presentations;

the answer would be c. sediment buildup on continental slope

                                                                                -hope this -

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.