Why did christian art become publicly accepted during the third century?

In 313, Constantine issued the Edict of Milan granting all people in the Roman Empire freedom to worship whatever god they wished.

Explanation:

i would say the answer is b. zigzag lines of the leaves. i believe this is the answer because zigzag lines go in different direction while the other options like: the vertical lines of the trees, the dotted lines on the road, and the curved lines of the park benches go in one direction.

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