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The picture shown above depicts the proclamation passed in 313 CE known as the Edict of Milan.
The Edict of Milan put an end to the persecution that Christians had suffered under the previous emperors and allowed for it to gain such prominence that it became the state religion within the year.
In conclusion, option A is correct.
Find out more on the Edict of Milan at https://brainly.com/question/9468136.