Final answer:
The fall of the Western Roman Empire is commonly associated with the year 476 AD.
Step-by-step explanation:
The year commonly associated with the fall of the Western Roman Empire is 476 AD (option a). This event marked the end of the ancient Roman civilization in the Western part of the empire. It was a result of various factors, including invasions by Germanic tribes, economic decline, political instability, and the shifting of power to the Eastern Roman Empire.
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