Why were the severan rulers successful in keeping order in the roman empire?

The Severan rulers were strong because of their development of the military. They put military first and did not care about any other aspect of having a society, and with a stable and strong military, one can easily rule.

C. it's a true fact. i know because we are studying about the great depression. so it best illustrates a claim of fact. thx. have a wonderful day!

B,c and d are the answers