D beacuse they work hard and get rewarded for it!
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Explanation:
In the provinces were divided into Chinese judged by chief;Under the chief were the head responsible for the villages. The Empire has had a fixed army, where the main duty was to defend/develop the empire. The king/Caesar was a symbol of the unit because he was half-divine.
Roman Empire
The Fall of the Western Roman Empire (also called Fall of the Roman Empire or Fall of Rome) was the process of decline in the Western Roman Empire in which the Empire failed to enforce its rule, and its vast territory was divided into several successor polities.
Invasions by Barbarian tribes
The most straightforward theory for Western Rome's collapse pins the fall on a string of military losses sustained against outside forces. Rome had tangled with Germanic tribes for centuries, but by the 300s “barbarian” groups like the Goths had encroached beyond the Empire's borders
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