How did anti-federalists feel about a strong central government?
a. they favored it.
b. they mostly favored it but had some concerns. some opposed it and some favored it.
c. they opposed it.?

C, they opposed it, because they were against strong federal power.

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.