Answer:
Option: D. Rome collapsed because of internal weaknesses, not because of attacks from foreign invaders.
Step-by-step explanation:
The reason behind the decline of the Roman Empire is not stated in a particular cause but rather in several reasons behind the downfall of the empire. Reasons for the decline of the Roman Empire were invasions by barbarian tribes the Huns, economic and political instability, over expansion and military overspending, Christianity, weakening of the Roman legions in Europe.