What was an anti-federalist?
a. a person who did not support the addition of a bill of rights to the new constitution
b. a person who wanted the new constitution to add a fourth branch of government
c. a person who did not support the ratification of the new constitution
d. a person who wanted the new constitution to abolish slavery

The answer is C.
C. A person who did not support the ratification of the new constitution. 

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.