The pax romana ended in 180 ce after over one hundred fifty years in existence. the end of this era ushered in a period of
a. inflation.
b. foreign wars.
c. religious wars.
d. political instability.

D. political instability.

Explanation:

The Pax Romana is a period when there were peace and stability across the Roman Empire that lasted for over one hundred and fifty years. The end of this era ushered in a period of great instability, where there were civil wars leading to the division of the empire, political conspiracies leading to in many senators been assassinated and provincial and slave rebellions.  

explanation:

i think it is in quadrant 4.

the five year plans were part of a command economy. there was little choice in what would be emphasized for the current 5 year period.

the answer to democracy or totalitarianism is a bit harder. in stalin's time, russia was totalitarian. now that's not entirely true. putin has moved towards at least the boundary.