Cuales son las dificultades que tienen los historiadores para conocer la Edad Oscura

.

explanation:

monopolies  came to the united states with the colonial administration. the large-scale public works needed to make the new world hospitable to old world immigrants required large companies to carry them out. these companies were granted exclusive contracts for these works by the colonial administrators. even after the american revolution, many of these colonial holdovers still functioned due to the contracts and land

read more on -

it should be a. song dynasty’s civil service examination system created an administrative bureaucracy manned by the landed aristocracy.