The best explanation for why the byzantine empire could not expand Christianity to the east and the south is that... A. nomadic mongols threaten invasion
B. the Islamic caliphate blocked expansion
C. Visigoths claimed areas to the east and south Constantinople
D. trade along the silk Rode would have been harmed by missionary activity

B. The Islamic caliphate blocked expansion

the story goes that because of this belief, constantine was able to defeat his foes. constantine became an ardent1 christian. christianity and other religions were tolerated under constantine's rule. constantine also was responsible for the building of a great cathedral in rome.

the process of industrialization is called a revolution because