I am tired of asking questions and no one answering So please answer! Which two factors contributed to the fall of the Roman Empire?

1.The Yellow Turbans led a rebellion against the emperor, which led to the emperor losing the Mandate of Heaven.

2.The government stopped paying soldiers, so they were no longer loyal to the empire.
Invaders became absorbed into the Hindu culture of the region rather than altering the culture of the people.

3.Invaders became absorbed into the Hindu culture of the region rather than altering the culture of the people.

4.Communication throughout the empire was too slow to keep the government in contact with remote regions.

5.The abacus and Roman numerals were created to help keep track of money used for trading.