Answer:
a. all people in the Roman Empire freedom to worship whatever god they wished
Step-by-step explanation:
The Edict of Milan was a legal act signed by Constantine the Great and Licinius, which proclaimed Christian equality and the end of the persecution of Christians which lasted for 300 years. It came into force in Mediolan (Milan) in 313 BC.
The Edict didn’t declare Christianity state religion, nor it was privileged, but all the Christians were allowed to profess their religion without any consequences.