Respuesta :
The answer is: D. They are run by boards of directors.
The board of directors in companies consist of several people with Specific field of expertise. Each directors are placed to oversee each divisions of the company. Together, they control/manage the whole operation.
Our government had a very similar system, but we do not call them 'directors'. We call them Ministers. Each ministers had the responsibility to aid the president in managing a certain sector.