Which of the following would represent a chemical change

•change in odor
•release of late
•unexpected change in odor
•precipitate is formed (a solid is created)
• temper change
•a new product is formed
•formation of bubbles
•it can not be undone or reversed

Idont know which one is right   but i know that c is wrong and a might be wrong

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.