Answer:
The question is incomplete as the options are not given. There are a lot of factors that contributed to it but major factors which led to the fall of Rome were:
- The city was raided again and again by outside forces which destroyed it.
- It was divided into two part during the rise of eastern empire. Both parts drifted apart with time, and failed to work together.
- Economical trouble mainly due to constants wars, overspending, inflation and poor taxation system.
- Government corruption and ineffective leadership
- Decline of Rome's Military
- Loss of Christianity and traditional values