They were hindered by economic development and lack of enforcement, so I'd say 1. Cost, because no one would pay for it.
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No sé la respuesta, pero necesito puntos porque un idiota sigue respondiendo a mi pregunta con enlaces y se me están acabando los puntos.
Explanation:
Answer:
The Roman Empire became less stable over the course of the Third to Fifth centuries CE. Historians point to internal divisions as well as repeated invasions from tribes such as the Huns and the Visigoths as reasons why the Empire fell. The fall of the Western Roman Empire occurred in 476 CE.
Explanation:
