Select all the correct answers. Which two causes of decline were common to the Roman, Han, and Gupta empires?
A. Political movements worked to overthrow the government to create a utopia.
B. Powerful lords broke the empire into three separate parts.
C. Trade with other nations declined as the government weakened.
D. Nomadic invaders sacked and destroyed property within the empire.
E. New religions replaced those of the people in the empire.