In the third paragraph, the author most probably provides an explanation of the apparent connections among economic, military, and cultural development in order to ______.

A．To show that Augustan Rome and fifth-century Athens are examples of cultural, economic, and military expansion against which all subsequent cases must be measured.
B．To suggest that cultural, economic and military advances have tended to be closely interrelated in different societies.
C．To argue that, while the revivals of Augustan Rome and fifth-century Athens were similar, they are unrelated to other historical examples.
D．To indicate that, wherever possible, historians should seek to make comparisons with the earliest chronological examples of revival.

A．had eliminated the Bulgarian army.
B．were comparable in size to the army of Rome under Augustus.
C．were strong enough to withstand the Abbasid Caliphate's military forces.
D．had achieved control of Byzantine governmental structures