Which factor that contributed to the fall of the byzantine empire is the author describing in this passage?
a. invasion of ottoman turks
b. impact of the plague on population
c. attacks by muslim empires
d. effects of justinian code

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.

should be the answer hope this

i would go with the last one