Answer:
A. internal civil wars.
C. economic disaster.
E. foreign invasions.
Step-by-step explanation:
The Crisis of the Third Century was a period during which the Roman Empire was close to collapsing. Several internal and external pressures, including civil wars, economic disasters, foreign invasions, peasant rebellions and political instability complicated this situation. The crisis eventually led to profound changes in the empire's institutions, society, economic life and religion.