In 313 ce, constantine the great issued the edict of milan. what effect did this law have?
a. it restricted the spread of christianity across the roman empire by encouraging persecution of religious minorities.
b. it promoted the spread of christianity by uniting the eastern and western parts of the roman empire.
c. it promoted the spread of christianity across the roman empire by allowing people to worship freely.
d. it restricted the spread of christianity by dividing christians into followers of roman catholicism and followers of eastern orthodoxy.