Western Roman Empire finally collapsed due to

A. attacks by the Persians

B. civil wars between army commanders

C. attacks by Germanic tribes

D. conquest by the eastern empire

WesternRoman Empire collapsed due to the attacks by Germanic tribes. (Option C).

The beginning of declining stated in the middle of the IV century A. D., due to several problems, such as the invasions of the Germanic tribes, also known as the barbarians, economic crisis and the dispute for power between military.