What preemptive power is rooted in the Constitution that allows Congress to impose national priorities on states through national legislation

the answer is d. amendments.

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.

answer; adoption agencies tend to place separated twins in similar homes;

answer; motor learning;