Correct answer: political instability, military conflict, economic crisis.
Political, military and economic problems weakened the Roman Empire.
- The Roman Empire was so large and it was hard to spread news was the main political reason to the Roman Empire´s decline.
- Rome was constantly at war with nomadic peoples was the main military reason to the Roman Empire´s decline.
- The lack of food to feed the people, low on money, couldn't pay the soldiers and taxes were high, land was worn out and harvests didn't increase were the main economic reasons to the Roman Empire´s decline.
There were several reasons for the fall of the Roman Empire (even the initiation of Christianity).