In an effort to protect domestic jobs, some countries will place a limit on the number of certain types of products that can be imported. these limits are called:
a. revenue tariffs.
b. protective tariffs.
c. import quotas.
d. tariffs.

c. import quotas.

Explanation:

Import quotas are limitations that the government imposes on the amount that can be imported from a given good or input. Import quotas have as their main reason the protection of the national industry and the employment that this industry generates. When a government sets an import quota, it understands that the national industry is at risk if too many products enter the country and compete with the national industry, which can break down and generate unemployment.

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.