Answer:
Correct answer is B peace, prosperity, and flourishing trade.
Step-by-step explanation:
A is not correct as this period is known as Principate.
B is the correct because it refers to the period between 27 BC to 180 AD during which Roman empire was at the peak of its power and spread peace. Pax Romana actually means Roman peace.
C is not correct as this happened after 313 and Edict of Milan.
D is not correct as this happened in the period between two triumvirates.