Artifacts reflecting values of an organization include
a. mission statements
b. an office layout that includes open spaces
c. shared principles
d. executive suites

I think the correct answer would be an office layout that includes open spaces. Artifacts are very obvious symbols in an organization culture. For example, the rewards for employees, the layout of the offices and how they greet visitors. Hope this helped.

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.