A solution is a special kind of mixture. Some substances can dissolve in water; some substances cannot. Which of the following objects will dissolve in a solution water? what is the anwer

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.

the answer to your question is,

d. when a child was born.

-mabel < 3